Central Retinal Vein Occlusion (CRVO)

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 8 min read
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Central Retinal Vein Occlusion (CRVO) is a medical condition that affects the eye, particularly the central vein that carries blood away from the retina. This condition can lead to vision problems, and it's essential to understand its types, causes, symptoms, diagnostic tests, treatment options, and...

For severe symptoms, danger signs, pregnancy, child illness, or sudden worsening, seek urgent medical care.

বাংলা রোগী নোট এখনো যোগ করা হয়নি। পোস্ট এডিটরে “RX Bangla Patient Mode” বক্স থেকে সহজ বাংলা সারাংশ যোগ করুন।

এই তথ্য শিক্ষা ও সচেতনতার জন্য। এটি ডাক্তারি পরীক্ষা, রোগ নির্ণয় বা প্রেসক্রিপশনের বিকল্প নয়।

Article Summary

Central Retinal Vein Occlusion (CRVO) is a medical condition that affects the eye, particularly the central vein that carries blood away from the retina. This condition can lead to vision problems, and it's essential to understand its types, causes, symptoms, diagnostic tests, treatment options, and medications. In this article, we will provide clear and straightforward explanations of CRVO and its various aspects to enhance readability,...

Key Takeaways

  • This article explains Common Causes of Central Retinal Vein Occlusion (CRVO) in simple medical language.
  • This article explains Symptoms of Central Retinal Vein Occlusion (CRVO) in simple medical language.
  • This article explains Diagnostic Tests for Central Retinal Vein Occlusion (CRVO) in simple medical language.
  • This article explains Treatments for Central Retinal Vein Occlusion (CRVO) in simple medical language.
Educational health guideWritten for patient understanding and clinical awareness.
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Emergency safety firstUrgent warning signs are highlighted below.

Seek urgent medical care if you notice

These warning signs are general safety guidance. Local emergency numbers and clinical judgment should always come first.

  • Sudden vision loss, severe eye pain, new flashes, or many new floaters.
  • Eye symptoms after injury or chemical exposure.
  • Rapidly worsening redness, swelling, or vision changes.
1

Emergency now

Use emergency care for severe, sudden, rapidly worsening, or life-threatening symptoms.

2

See a doctor

Book a professional medical evaluation if symptoms persist, worsen, recur often, affect daily activities, or occur in a high-risk patient.

3

Learn safely

Use this article to understand possible causes, tests, treatment options, prevention, and questions to ask your clinician.

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Start here Choose the right pathway for symptoms, reports, medicines, or urgent warning signs. Disease article roadmap Read this topic step by step: meaning, symptoms, warning signs, diagnosis, treatment, prevention, and follow-up. Treatment planner Prepare questions about treatment choices, benefits, risks, side effects, and follow-up. Family & caregiver guide Organize symptoms, reports, medicines, questions, and follow-up safely. Nutrition & diet guide Prepare food, hydration, supplement, and medicine-timing questions safely. Prevention guide Organize risk factors, protective habits, screening, and warning signs. Recovery guide Prepare a safe plan for activity, rehabilitation, warning signs, and follow-up.
Definition

Central Retinal Vein Occlusion (CRVO) is a medical condition that affects the eye, particularly the central vein that carries blood away from the retina. This condition can lead to vision problems, and it’s essential to understand its types, causes, symptoms, diagnostic tests, treatment options, and medications. In this article, we will provide clear and straightforward explanations of CRVO and its various aspects to enhance readability, visibility, and accessibility.

Types of Central Retinal Vein Occlusion (CRVO)

CRVO can be categorized into two main types: Non-Ischemic CRVO and Ischemic CRVO.

  1. Non-Ischemic CRVO: Non-Ischemic CRVO is the milder form of the condition. It occurs when the blood flow to the retina is partially blocked, but the retina still receives enough oxygen to function relatively normally.
  2. Ischemic CRVO: Ischemic CRVO is the more severe type. It happens when there is a significant blockage of blood flow to the retina, leading to reduced oxygen supply. This type often has more severe vision impairment.

Common Causes of Central Retinal Vein Occlusion (CRVO)

Various factors can contribute to the development of CRVO. Here are 20 common causes:

  1. Age: CRVO is more common in older adults.
  2. High Blood Pressure: Elevated blood pressure can increase the risk.
  3. insulin is low or not working well. সহজ বাংলা: রক্তে চিনি বেশি থাকার রোগ।" data-rx-term="diabetes" data-rx-definition="Diabetes is a condition where blood sugar stays too high because insulin is low or not working well. সহজ বাংলা: রক্তে চিনি বেশি থাকার রোগ।">Diabetes: People with diabetes are at a higher risk.
  4. Smoking: Smoking is a significant risk factor.
  5. Glaucoma: Having glaucoma may increase the likelihood.
  6. High Cholesterol: Elevated cholesterol levels can play a role.
  7. Blood Clotting Disorders: Conditions that promote blood clotting can be a factor.
  8. Cardiovascular Disease: Heart-related conditions may contribute.
  9. Family History: A family history of CRVO can raise the risk.
  10. Obesity: Being overweight can be a risk factor.
  11. Medications: Some drugs, such as birth control pills, can increase risk.
  12. Sleep Apnea: This condition may be associated with CRVO.
  13. Vasculitis: infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">Inflammation of blood vessels can be a cause.
  14. Thrombophilia: An increased tendency to form blood clots.
  15. Hyperviscosity: Thickened blood can lead to CRVO.
  16. Autoimmune Diseases: Conditions like lupus can contribute.
  17. Ocular infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">Inflammation: Eye inflammation may increase risk.
  18. Dehydration: Lack of proper hydration can be a factor.
  19. Trauma: Eye injuries can lead to CRVO.
  20. Radiation Therapy: Previous radiation treatment near the eye can be a cause.

Symptoms of Central Retinal Vein Occlusion (CRVO)

CRVO can manifest with various symptoms, and they may vary in severity. Here are 20 common symptoms:

  1. Sudden Blurred Vision: A sudden loss of sharp vision.
  2. Floaters: Small, dark spots or lines in your vision.
  3. Distorted Vision: Objects may appear bent or twisted.
  4. Reduced Color Vision: Colors may seem less vibrant.
  5. Vision Loss: Partial or complete loss of vision.
  6. Eye Pain: Discomfort or pain in the affected eye.
  7. Redness: The eye may appear red or bloodshot.
  8. Photophobia: Sensitivity to light.
  9. Headaches: Frequent or severe headaches.
  10. Eye Pressure: A feeling of pressure in the eye.
  11. Difficulty Reading: Trouble reading small print.
  12. Visual Field Defects: Missing areas in your vision.
  13. Dark Curtain: A shadow or dark curtain in your vision.
  14. Wavy Lines: Straight lines may appear wavy.
  15. Vision Changes with Position: Symptoms may worsen with certain head positions.
  16. Double Vision: Seeing two of the same object.
  17. Eye Fatigue: Easily tired eyes, especially after reading.
  18. Night Blindness: Difficulty seeing at night.
  19. Increased Tears: Excessive tearing or watering of the eye.
  20. Loss of Peripheral Vision: Reduced side vision.

Diagnostic Tests for Central Retinal Vein Occlusion (CRVO)

To diagnose CRVO and determine its severity, eye specialists may perform several tests. Here are 20 common diagnostic tests:

  1. Visual Acuity Test: Measures how well you can see letters on an eye chart.
  2. Tonometry: Measures eye pressure to check for glaucoma.
  3. Fundus Examination: Allows the doctor to view the retina and detect abnormalities.
  4. Fluorescein Angiography: Uses dye and photographs to identify blood vessel issues.
  5. Optical Coherence Tomography (OCT): Produces detailed images of the retina.
  6. Retinal Photography: Takes pictures of the back of the eye.
  7. Color Vision Testing: Assesses color perception.
  8. Amsler Grid Test: Detects distortions or missing areas in vision.
  9. Gonioscopy: Examines the eye’s drainage angle.
  10. Blood Tests: Assess blood clotting factors and other potential causes.
  11. Electroretinogram (ERG): Measures retinal function.
  12. Visual Field Test: Maps your peripheral vision.
  13. Ultrasound: Uses sound waves to visualize the eye’s interior.
  14. Intraocular Pressure Measurement: Checks for increased eye pressure.
  15. Slit-Lamp Examination: Inspects the anterior eye structures.
  16. Echocardiogram: Assesses heart function.
  17. Blood Pressure Monitoring: Measures blood pressure levels.
  18. Complete Eye Exam: Comprehensive evaluation of eye health.
  19. Optical Biometry: Measures eye dimensions for potential surgeries.
  20. Coagulation Tests: Checks for blood clotting disorders.

Treatments for Central Retinal Vein Occlusion (CRVO)

Management of CRVO aims to alleviate symptoms and prevent further complications. Here are 30 treatment options:

  1. Observation: In mild cases, observation and monitoring may be sufficient.
  2. Lifestyle Changes: Managing blood pressure, insulin is low or not working well. সহজ বাংলা: রক্তে চিনি বেশি থাকার রোগ।" data-rx-term="diabetes" data-rx-definition="Diabetes is a condition where blood sugar stays too high because insulin is low or not working well. সহজ বাংলা: রক্তে চিনি বেশি থাকার রোগ।">diabetes, and cholesterol.
  3. Anti-VEGF Injections: Medications like ranibizumab can reduce swelling.
  4. Intravitreal Steroid Injections: Steroids may help decrease infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">inflammation.
  5. Laser Photocoagulation: Laser treatment can seal leaking blood vessels.
  6. Anti-Platelet Therapy: Medications like aspirin to reduce blood clotting.
  7. Blood Thinners: Anticoagulants may prevent blood clots.
  8. Eye Drops: Lubricating drops to relieve dryness and discomfort.
  9. Low Vision Aids: Devices to improve impaired vision.
  10. Hyperbaric Oxygen Therapy: Increases oxygen supply to the eye.
  11. Vision Rehabilitation: Training and therapy for better vision.
  12. Retinal Surgery: For severe cases with retinal detachment.
  13. Retinal Cryopexy: Freezing treatment for retinal tears.
  14. Vitrectomy: Surgical removal of vitreous gel.
  15. Ozurdex Implant: A steroid implant to reduce swelling.
  16. Scleral Buckling: Corrects retinal detachment.
  17. infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।" data-rx-term="inflammation" data-rx-definition="Inflammation is the body’s response to injury, infection, or irritation, often causing pain, swelling, heat, or redness. সহজ বাংলা: শরীরের প্রদাহ; ব্যথা, ফোলা বা লালভাব হতে পারে।">inflammation, pain, or swelling. সহজ বাংলা: প্রদাহ/ফোলা/ব্যথা কমায়।" data-rx-term="anti-inflammatory" data-rx-definition="Anti-inflammatory means reducing inflammation, pain, or swelling. সহজ বাংলা: প্রদাহ/ফোলা/ব্যথা কমায়।">Anti-Inflammatory Drugs: Medications to reduce inflammation.
  18. Macular Edema Treatment: Focused therapy for macular swelling.
  19. Omega-3 Supplements: May improve retinal health.
  20. Blood Pressure Medication: If hypertension contributes to CRVO.
  21. Diabetic Control: Managing blood sugar levels for diabetic patients.
  22. Smoking Cessation: Quitting smoking to reduce risk.
  23. Weight Management: Maintaining a healthy weight.
  24. Hydration: Staying adequately hydrated.
  25. Regular Exercise: Promotes overall health.
  26. Eye Protection: Avoiding eye injuries.
  27. Stress Management: Reducing stress levels.
  28. Proper Nutrition: Eating a balanced diet.
  29. Sleep Quality: Ensuring good sleep hygiene.
  30. Medication Review: Evaluating medications for potential side effects.

Medications for Central Retinal Vein Occlusion (CRVO)

Several medications may be prescribed to manage CRVO. Here are 20 common drugs:

  1. Ranibizumab (Lucentis): An anti-VEGF medication.
  2. Bevacizumab (Avastin): Another anti-VEGF option.
  3. Aflibercept (Eylea): Reduces retinal swelling.
  4. Dexamethasone (Ozurdex): An intravitreal steroid implant.
  5. Triamcinolone Acetonide: Another steroid option.
  6. Aspirin: An anti-platelet drug.
  7. Warfarin: An anticoagulant for blood thinning.
  8. Clopidogrel (Plavix): Reduces blood clot formation.
  9. Atorvastatin (Lipitor): Manages cholesterol levels.
  10. Lisinopril (Prinivil): Controls high blood pressure.
  11. Metformin (Glucophage): Regulates blood sugar.
  12. Omega-3 Fatty Acids: Supplements for eye health.
  13. Artificial Tears: Lubricating eye drops.
  14. Brinzolamide (Azopt): Lowers intraocular pressure.
  15. Latanoprost (Xalatan): For glaucoma management.
  16. Dorzolamide-Timolol (Cosopt): Combines two glaucoma drugs.
  17. Clonidine (Catapres): Treats high blood pressure.
  18. Topiramate (Topamax): Manages glaucoma.
  19. Acetazolamide (Diamox): Reduces intraocular pressure.
  20. Pilocarpine (Pilopine HS): A glaucoma medication.

Surgery for Central Retinal Vein Occlusion (CRVO)

Surgery is typically reserved for severe cases of CRVO. Here are 10 surgical options:

  1. Vitrectomy: Removes the vitreous gel from the eye.
  2. Retinal Detachment Repair: Fixes detached retinas.
  3. Scleral Buckling: Corrects retinal detachment.
  4. Laser Photocoagulation: Seals leaking blood vessels.
  5. Retinal Cryopexy: Freezing treatment for retinal tears.
  6. Goniotomy: For glaucoma management.
  7. Trabeculotomy: Increases drainage in the eye.
  8. Canaloplasty: Improves drainage for glaucoma.
  9. Ahmed Valve Implant: Manages intraocular pressure.
  10. Subconjunctival Injection: Medications injected under the eye’s surface.

Conclusion:

Central Retinal Vein Occlusion (CRVO) is a serious eye condition that can affect anyone, but it is more common in older adults and individuals with certain health conditions. Understanding its types, causes, symptoms, diagnostic tests, treatment options, and medications is crucial for timely diagnosis and management.

If you or someone you know experiences any symptoms related to CRVO, it is essential to seek immediate medical attention. Early diagnosis and appropriate treatment can help preserve vision and improve the quality of life for individuals affected by this condition.

 

Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, previous medical  history is also unique. So always seek the best advice from a qualified medical professional or health care provider before trying any treatments to ensure to find out the best plan for you. This guide is for general information and educational purposes only. If you or someone are suffering from this disease condition bookmark this website or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. Thank you for giving your valuable time to read the article.

  1. https://medlineplus.gov/skinconditions.html
  2. https://www.aad.org/about/burden-of-skin-disease
  3. https://www.usa.gov/federal-agencies/national-institute-of-arthritis-musculoskeletal-and-skin-diseases
  4. https://www.cdc.gov/niosh/topics/skin/default.html
  5. https://www.skincancer.org/
  6. https://illnesshacker.com/
  7. https://endinglines.com/
  8. https://www.jaad.org/
  9. https://www.psoriasis.org/about-psoriasis/
  10. https://books.google.com/books?
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  12. https://cms.centerwatch.com/directories/1067-fda-approved-drugs/topic/292-skin-infections-disorders
  13. https://www.fda.gov/files/drugs/published/Acute-Bacterial-Skin-and-Skin-Structure-Infections—Developing-Drugs-for-Treatment.pdf
  14. https://dermnetnz.org/topics
  15. https://www.aaaai.org/conditions-treatments/allergies/skin-allergy
  16. https://www.sciencedirect.com/topics/medicine-and-dentistry/occupational-skin-disease
  17. https://aafa.org/allergies/allergy-symptoms/skin-allergies/
  18. https://www.nibib.nih.gov/
  19. https://rxharun.com/resources/category/resources/rxharun/article-types/skin-care-beauty/skin-diseases-types-symptoms-treatment/
  20. https://www.nei.nih.gov/
  21. https://en.wikipedia.org/wiki/List_of_skin_conditions
  22. https://en.wikipedia.org/?title=List_of_skin_diseases&redirect=no
  23. https://en.wikipedia.org/wiki/Skin_condition
  24. https://oxfordtreatment.com/
  25. https://www.nidcd.nih.gov/health/
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  27. https://www.nccih.nih.gov/health
  28. https://catalog.ninds.nih.gov/
  29. https://www.aarda.org/diseaselist/
  30. https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets
  31. https://www.nibib.nih.gov/
  32. https://www.nia.nih.gov/health/topics
  33. https://www.nichd.nih.gov/
  34. https://www.nimh.nih.gov/health/topics
  35. https://www.nichd.nih.gov/
  36. https://www.niehs.nih.gov
  37. https://www.nimhd.nih.gov/
  38. https://www.nhlbi.nih.gov/health-topics
  39. https://obssr.od.nih.gov/
  40. https://www.nichd.nih.gov/health/topics
  41. https://rarediseases.info.nih.gov/diseases
  42. https://beta.rarediseases.info.nih.gov/diseases
  43. https://orwh.od.nih.gov/

 

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Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

  • Write when the problem started and how it changed.
  • Bring old prescriptions, investigation reports, and current medicines.
  • Write allergies, pregnancy status, diabetes, kidney/liver disease, and major past illnesses.
  • Bring one family member if the patient is weak, elderly, confused, or a child.

Questions to ask

  • What is the most likely cause of my symptoms?
  • Which danger signs mean I should go to hospital quickly?
  • Which tests are necessary now, and which can wait?
  • How should I take medicines safely and what side effects should I watch for?
  • When should I come for follow-up?

Tests to discuss

  • Vital signs: temperature, pulse, blood pressure, oxygen saturation
  • Basic physical examination by a clinician
  • CBC, urine test, blood sugar, or imaging only when clinically needed

Avoid these mistakes

  • Do not use antibiotics, steroid tablets/injections, or strong painkillers without proper medical advice.
  • Do not hide pregnancy, kidney disease, ulcer, allergy, or blood thinner use.
  • Do not delay emergency care when danger signs are present.

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This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Avoid heavy lifting, sudden bending, and prolonged bed rest.
  • Use comfortable posture and gentle movement as tolerated.
  • Discuss physiotherapy, X-ray, or MRI only when clinically needed.

OTC medicine safety

  • For mild back pain, pain-relief medicine may be discussed with a doctor or pharmacist.
  • Avoid repeated painkiller use if you have kidney disease, stomach ulcer, uncontrolled blood pressure, or are taking blood thinners.

Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
  • Do not use steroid tablets or injections casually for quick relief.
  • Do not delay emergency care because of home remedies.

Get urgent help if

  • Back pain with leg weakness, numbness around private area, loss of urine/stool control, fever, cancer history, or major injury needs urgent care.
Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

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Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Doctor / qualified healthcare provider
Tests to discuss with doctor
  • Basic vital signs: temperature, pulse, blood pressure, oxygen level if needed
  • Relevant blood, urine, imaging, or specialist tests only after clinical assessment
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: Central Retinal Vein Occlusion (CRVO)

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

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Write your symptom story. A health professional or site editor can review it before any answer is prepared. This box is not for emergency care.

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Frequently Asked Questions

Is this article a replacement for a doctor?

No. It is educational content only. Patients should consult a qualified clinician for diagnosis and treatment.

When should I seek urgent care?

Seek urgent care for severe symptoms, rapidly worsening condition, breathing difficulty, severe pain, neurological changes, or any emergency warning sign.

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  8. Congenital Absence of Lacrimal Puncta and Salivary Glands

    DefinitionCongenital? absence of lacrimal puncta and salivary glands means that a baby is born without the tiny tear drainage openings on the eyelids (lacrimal puncta) and...

    March 5, 2026 • Rx Eye & Vision Care (A - Z)
  9. Aplasia of the Lacrimal and Salivary Glands

    DefinitionAplasia of the lacrimal and salivary glands means that the tear glands and saliva glands did not grow properly before birth. They are partly formed, very...

    March 5, 2026 • Rx Eye & Vision Care (A - Z)
  10. Cone-Rod Dystrophy Type 6

    DefinitionCone-rod dystrophy type 6 (often written as CORD6) is a rare eye disease that slowly damages the light-sensing cells (cones and rods) in the retina, the...

    March 4, 2026 • Rx Eye & Vision Care (A - Z)