Many people experience poorer night vision, and so do me. First of all, biologically, human have a poor night vision than many other animals, because night vision is made of two approaches combination, sufficient spectral range and sufficient tapetum lucidum. Human lacks the tapetum lucidum, so normally we have a not so good vision in night. I am not sure how poor your night vision is. If it is a very serious problem, which impacts your daily life, then it might be sending some indication to require for your attention. As to the underlying root, it ranges from bright sunlight exposure to chronic disease. Finding out the root is imperative to get proper treatment. Sunlight exposure might weaken night vision ability up to two days, which sounds creepy but it is true. The bright light could impair your night vision, so if you need to go to beach to enjoy sunshine, you must wear sunglasses to protect your eyes. Vitamin or zinc deficiency might lead to night vision problem too. It is rare but possible. Have more carrots, yellow or green leafy vegetables (for vitamin A), beef, beans and nuts (for zinc), which have sufficient nutrition of vitamin A and zinc. The first symptom of cataracts is poor night vision. The vision is blurred and distorted so that you might see halos around light. People with diabetes have a higher risk to get eye conditions. High blood sugar might damages blood vessels and nerve ends, which contribute to bad night vision. If you just had your Lasik surgery, the bad night vision is one of the common side effects it might bring to you temporarily. After you got completely healed in 3-6months, it will disappear in most cases. Just visit your ophthalmologist, he or she can give you the guidance and proper treatment.
