Hemeralopia (Nyctalopia)

Hemeralopia (niktalopiya, night blindness, night blindness) is an ophthalmologic disease that manifests itself in sharp deterioration of vision in conditions of poor illumination, at night or in the evening. Hemeralopia differs for symptomatic, essential and congenital


Symptomatic hemorrhagia may develop as a consequence of organic eye diseases:

- High degree of myopia

- Glaucoma

- Pigmented degeneration of the retina

- Inflammation of the retina

- Retinal disinsertion

- Inflammation of the choroid and optic nerve

As a rule, symptomatic hemorrhagia is accompanied by a change in the field of vision and the fundus

Essential hemostalopia occurs due to the following factors:

- Prolonged exposure to very bright eyes

- Neurasthenia

- Lack (or complete absence) of vitamins A, B2 and C

- Diseases of the liver

- Unbalanced nutrition

Congenital hemorrhagia manifests itself in childhood or adolescence. The reasons for its occurrence are still not completely clear, but it is assumed that the cause of its occurrence may be Asher's syndrome or pigment retinitis


In darkness, twilight, in poor light conditions, people with gemeralopia experience poor vision. However, at the same time, under the conditions of normal illumination, these same people see well enough.

Symptoms of this disease begin to manifest even in early childhood. Kids in poor light conditions lose their spatial orientation, they no longer distinguish colors and see objects around themselves.

The diagnosis is based on the clinical picture, the results of laboratory tests and personal patient complaints


In this disease, a special role is given to preventive measures: treatment of concomitant ophthalmic diseases and proper rational nutrition. The treatment of night blindness is primarily aimed at eliminating the disease that caused hemorrhagia.

Recommended list of products for patients with hemorrhagia:

- Rich in vitamin A. Milk, cheeses, egg yolks, cod liver and cow butter, carrots, green onions, spinach, etc.

- Prositamin A. Peaches, apricots, gooseberries, cherries, blueberries and blackberries rich in provitamin.

Locally attributed to the use of eye drops - 5% solution melanotsitostimuliruyuschego hormone - intermedin. Riboflavin is prescribed in dosage: not more than 0.02 g per day. In addition to nutrition saturated with vitamins, special complexes of vitamins A, B2, PP and C are ascribed.

More articles on this topic:

1. The Eversion of the Century

2. Blepharospasm