Diabetic papillopathy is a condition seen in people with diabetes where the head of the optic nerve (the “optic disc”) becomes swollen or puffy. This swelling ...

Diabetic Macular Ischemia (DMI) is a complication of diabetic eye disease where the tiny blood vessels supplying the central part of the retina (the macula) ...

Diabetic Macular Edema is swelling in the central part of the retina called the macula, caused by leakage of fluid from tiny, damaged blood vessels in people ...

Descemet’s membrane is a thin, strong layer at the back of the cornea. It sits just under the innermost cells of the cornea (the endothelium) and helps keep ...

A dermoid cyst is a benign (non-cancerous) lump that forms because of cells that are in the wrong place during early development. These cells are usually from ...

A dermis fat graft is a piece of a person’s own skin (without the top layer) plus the fat beneath it, taken from one part of the body and moved to another to ...

Dermatomyositis is a rare disease where the body’s own immune system attacks the muscles and the skin. It causes muscle weakness and a special kind of skin ...

Dermatochalasis is a medical term that means too much loose skin on the eyelids. Most often it happens on the upper eyelids but can also affect lower lids. The ...

Demyelinating optic neuritis is inflammation of the optic nerve caused by loss or damage of its myelin sheath—the protective coating that helps nerve signals ...

Demodex infestation, also called demodicosis, happens when tiny mites named Demodex that normally live on human skin grow too many in number or trigger ...

Idiopathic Intracranial Hypertension is a condition where the pressure inside the skull (intracranial pressure) is too high, but doctors can’t find a tumor, ...

Mohr-Tranebjærg syndrome (MTS), also called Deafness–Dystonia–Optic Neuronopathy (DDON) syndrome, is a rare, inherited disease that slowly damages nerves in a ...

Deafness-Dystonia-Optic Neuronopathy syndrome, also called Mohr-Tranebjærg syndrome (MTS), is a rare genetic disease that slowly damages nerves in different ...

Dead Bag Syndrome is a rare, late problem that happens years after cataract surgery. In cataract surgery, the cloudy natural lens of the eye is removed and an ...

Dacryocystitis is an infection or inflammation of the tear-drainage sac (the lacrimal sac) that sits just beside the bridge of your nose. Tears normally flow ...

A dacryocele is a soft, cyst-like swelling that forms where the tear-drainage sac sits beside the nose because the tear duct is blocked at both ends, trapping ...

Dacryoadenoma is a rare benign lacrimal gland tumor best managed by early recognition and complete surgical removal. Supportive care—including lifestyle, diet ...

Dacryoadenitis means inflammation of the lacrimal gland. “Dacryo-” refers to tears, and “-adenitis” means gland inflammation. So it literally means the tear ...

Cytomegalovirus (CMV) anterior uveitis is an eye disease in which a very common herpes-family virus infects or re-activates inside the front part of the uveal ...

Cystoid Macular Edema is a build-up of watery fluid inside the tiny layers of the macula—the spot in the very center of the retina that gives you sharp, ...