Bothnia Retinal Dystrophy (BRD)
Bothnia retinal dystrophy (BRD) is a rare, inherited eye disease. It usually begins in childhood with night blindness and very slow dark adaptation. Over time, people lose side (peripheral) vision ...
Rx Eye & Vision Care (A – Z)
Bosch-Boonstra-Schaaf Optic Atrophy–Intellectual Disability Syndrome (BBSOAS / NR2F1-Related Disorder)
Bosch-Boonstra-Schaaf optic atrophy–intellectual disability syndrome (BBSOAS / NR2F1-related disorder) written in very simple English. BBSOAS is a rare, genetic condition caused by a harmful change ...
Tritanomaly
Tritanomaly is a blue–yellow color vision deficiency. Your eye has three kinds of cone cells to see color: red-sensing (L), green-sensing (M), and blue-sensing (S). In tritanomaly, the S-cones are ...
Tritan Defect
A tritan defect is a problem with seeing and separating colors along the blue–yellow line. It happens when the short-wavelength (S) cones in the retina do not work normally. These cones are the cells ...
Tritan Colour Blindness
Tritan colour blindness is a problem with telling blue from green and yellow from violet. In this condition, the short-wavelength cone cells in the retina (called S-cones) do not work normally. Some ...
Tritan Color Blindness
Tritan color blindness is a problem with seeing blue and yellow correctly. It happens when the S-cones (short-wavelength cones) in the retina—or the blue-sensitive light pigment they use—don’t work ...
Dyschromatopsia
Dyschromatopsia means a problem seeing or telling colors apart. Colors may look faded, washed-out, wrong, or all very similar. Some people are born with it (congenital). Others develop it later in ...
Congenital Tritanopia
Congenital tritanopia is a very rare, inherited color-vision condition. People with tritanopia cannot see blue and yellow in the normal way. The problem sits in the eye’s short-wavelength cones ...
Blue/Yellow Color Vision Defect
A blue/yellow color vision defect means the eye and brain have trouble telling blue from green and yellow from violet. In the classic form (called “tritan”), the problem sits in the S-cones (the ...
Blue-Yellow Dyschromatopsia
Blue-yellow dyschromatopsia is a problem in seeing or separating blue from yellow hues. In the inherited form, the short-wavelength (blue-sensing) cone cells in the retina are missing or don’t work ...
Blue Color Blindness
Blue color blindness is a problem with seeing short-wavelength (“blue”) light accurately. It happens when the S-cones (the blue-sensitive cone cells in the retina) don’t work normally or are missing. ...
Blindness–Scoliosis–Arachnodactyly Syndrome
Blindness–Scoliosis–Arachnodactyly syndrome is a very rare genetic condition that mainly affects the eyes and the skeleton. People develop progressive vision loss that can lead to blindness, together ...
Blepharophimosis-Epicanthus Inversus-Ptosis Syndrome (BPES)
Blepharophimosis-Epicanthus Inversus-Ptosis Syndrome (BPES) is a rare condition that affects the eyelids from birth. The eye openings are narrow from side to side (blepharophimosis). There is a skin ...
Blepharophimosis–Intellectual Disability Syndrome, Ohdo Type
Blepharophimosis–intellectual disability syndrome, Ohdo type is a very rare, present-from-birth condition. Children have narrow eye openings (blepharophimosis), droopy eyelids (ptosis), and learning ...
Blepharophimosis–Intellectual Disability Syndrome, Maat-Kievit-Brunner Type
Blepharophimosis–intellectual disability syndrome, Maat-Kievit-Brunner type (often shortened to “MKB type”) is a very rare genetic condition. Children have narrow eye openings (blepharophimosis) and ...
Vitiliginous Choroiditis
Vitiliginous choroiditis is a long-lasting inflammation inside the back of the eye. It mainly affects the choroid (the layer that feeds the retina) and the retina (the light-sensing layer). The ...
Vitiliginous Chorioretinitis
Vitiliginous chorioretinitis is a long-lasting inflammation in the back of the eye. It mainly affects the choroid (the blood-rich layer under the retina) and the retina itself. Doctors see many pale, ...
Birdshot Retinochoroidopathy
Birdshot retinochoroidopathy is a rare, long-lasting inflammation that affects the back of both eyes. The problem lives in two layers: the retina (the light-sensing tissue) and the choroid (the ...
Birdshot Retinochoroiditis
Birdshot retinochoroiditis is a rare, long-lasting eye inflammation. It affects the back of the eye (the retina and the choroid). Doctors see many small, creamy, pale spots in both eyes. These spots ...
Birdshot Lesions
Birdshot lesions” are many small, cream-colored spots in the deeper eye layers (the choroid and retina). They are usually oval and radiate out from the optic disc toward the mid-periphery, often in ...
