
What is Night Blindness?
Night blindness is difficulty seeing in dim light. One of its main causes is retinitis pigmentosa, a genetic condition that affects the retinal cells…

Night Blindness manifests itself due to the inability of the eye to adapt to dark environments. Normally, in a healthy person, the eyes also adapt quickly in the transition to dim light. In this case, it does not cause complete blindness, although it affects vision in the direction of weak light or inability to see adequately in the dark.
Such problems are also known as nyctalopia. Since it is a result of different diseases, it is not considered a disease in itself. Retinitis Pigmentosa is one of the important causes among these diseases. This condition affects the photoreceptor cells responsible for vision in the retina, the layer of the eye that perceives the lower light. The age at which night blindness occurs and the way it progresses, the degree varies according to individuals.There are cells in the retina that help to see in light and dark places. These cells fulfil the function of vision by adjusting the light level inside the cell when the light is insufficient.
The main cause of reduced vision is the deterioration of photoreceptor cells in the retina. As a result of these, different function problems may occur in the perception of light. Night Blindness can also be caused bySymptoms of night blindness can manifest themselves in different ways. If it is caused by genetically inherited retinitis pigmentosa disease, the symptoms and time differ from person to person. Symptoms usually appear in childhood, but they can also begin in adolescence or adulthood.
Although the condition affects both eyes, the rate of progression and the degree of visual loss are difficult to predict from the beginning. The condition first narrows peripheral (side) vision and progressively reduces vision in low light, and in advanced stages it can lead to serious loss of sight. Night Blindness has symptoms such asFor the diagnosis of night blindness, the transition from light to darkness is measured. For this, a dark adaptation test can be performed; a visual field test shows whether peripheral vision has narrowed. Finally, the quality of vision in dim light is analysed.
Electroretinography and fundus examination can also be performed to determine whether there is an underlying eye disease. Early diagnosis and treatment are as important as many diseases related to eye health.More than one disease can play a role in the occurrence of night blindness. In order to determine the exact treatment method for the patient, it is necessary to diagnose the disease underlying the vision problem. In this context, the patient who complains of severe vision loss at night and in dim light should be examined in detail by an ophthalmologist.
If the main cause of Night Blindness is due to cataract or keratoconus, surgery option can also be used. In cataract, replacing the clouded lens with an intraocular lens usually improves vision in dim light. Hard contact lenses used in the treatment of keratoconus disease can also provide improvement in night vision as well as refractive problems of the eye.Over 24 years in eye care: three eye hospitals and a general hospital, a team of specialist surgeons and technology renewed every year.
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Night blindness is difficulty seeing in dim light. One of its main causes is retinitis pigmentosa, a genetic condition that affects the retinal cells…
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