Night blindness is a condition where night blindness is a problem seeing in the dark, a condition that can affect everyday life, for example, driving at night can make it difficult to see the road and can be dangerous it should be avoided to prevent accidents
best self care That is when there is a problem with vision. He should see an ophthalmologist to diagnose the cause and treat early Because vision problems can occur for a variety of reasons. and can have complex diseases Most of them are diseases that can be treated if you see a doctor from the beginning with symptoms such as myopia, cataracts, glaucoma, diabetic retinopathy. including night blindness or seeing in the dark The best self care is to follow a doctor. The nurse advises that it is always correct and complete See the doctor according to the appointment. And hurry to see a doctor before the appointment when there are abnormal symptoms.
night blindnessor problems seeing in the dark, dim light Patients will find it difficult to carry out normal tasks in dark or dim light. Or it takes time to adjust to being in the dark for longer than usual. Characteristics of people with night blindness They will have difficulty seeing in dimly lit places or with low light It usually happens when the vision needs to be adjusted from a very bright place. Go to a place without light, such as walking from outside a building, watching a film, or Driving at night with uneven lighting Night blindness is an important symptom of a disease that can increase the risk of driving at night. it should be avoided to prevent accidents
Night blindness is not a disease, but a condition of blurred vision in dim light. or at night It is found in many diseases of the retina, that is, in normal people within the retinawith sight sensing cells 2 types of photoreceptor cells in 1.Rod (rod-shaped cells) Rods are scattered throughout, but in large numbers on the peripheral retina, mainly responsible for dim light vision and 2.Cone (cone-shaped cells) Concentrated in the central retina, called especially the macula, serves to see in the center and in bright light.
If there is an abnormality in the central part of the retina Especially in the area of a clear image less clarity in conjunction with seeing the color change But if there is an abnormality in the retina around the edges with destruction or loss of duty or that Rod’s death causes blurred eyes at night or in dim light, called “Night Blindness“
Loss of function or death of Rod is seen in many diseases, such as vitamin-A deficiency. Vitamin that contributes to vision Lack of zinc Vitamin A needs to work together with zinc, so it is important to eat enough zinc. Which can be obtained by eating nuts, beef or poultry Eye problems such as myopia, cataracts, glaucoma, diabetic retinopathy Or there may be an abnormality in the retina. A genetic predisposition, such as retinitis pigmentosa, which cannot be cured. or taking certain medications, such as certain glaucoma medications, which cause the pupil to shrink Drugs in the group of cholinergic agents or very nearsightedness It can be corrected by using corrective lenses.
Night blindness in the early stagesThe peripheral field of vision will be lost. and when the disease is more serious The central visual field begins to lose until it becomes very narrow. And will lose the ability to adapt to see in the dark.
prevent before birth ‘Night blindness’ because there is currently no cure.
Method of treatmentA special tool is used to confirm the standard diagnosis, electroretinography (ERG), which reveals a reduction or loss of amplitude in the rod and cone cell waveforms.
Currently, there is no way to improve it. An ophthalmologist can advise on the inheritance of the disease and palliative treatment or refer to a low vision specialist in order to optimize the remaining sight. and retinal implant surgery can provide a level of vision sufficient to be able to help themselves, so they should be monitored regularly with an ophthalmologist regularly assessing the state of vision
Preventing night blindness Some cases can be prevented. such as vitamin-A deficiency By eating 5 food groups at each meal, such as cod liver oil, organ meats, egg yolks, carrots, broccoli, pumpkin, or high in omega-3 fatty acids such as deep sea fish, flax seeds, walnuts, oil horn Soybean oil, rice bran oil, but there are some causes such as inheritance It is a disease that cannot be prevented. But see an ophthalmologist early Your doctor will have treatments that may help slow down macular degeneration. Seeing an ophthalmologist can also help diagnose concomitant diseases that cause reduced vision. and concurrent treatment, such as cataracts, which are also found in patients with RP (Retinitis Pigmentosa), etc.
Information: Metta Hospital Medical Services Department
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