Thank you for your reply.
It's most likely that your natural lens
is hardening (form cataract) due to age, and therefore it's more difficult to bent the lights coming into your eyes, and focusing them perfectly at the back of your eye. During the day, there is more light, so your are able to see better, but at night there is less light, and is more difficult to focus. In addition, in bright light you may also notice glare (scattering of light). In general, the solution is simple these days - I suggest that you follow-up with your eye doctor for closer evaluation. You may need cataract surgery if giving you new prescription glasses
does not correct or help significantly the problem.
If cataract surgery is what you need, it is a procedure that lasts for about 10-15 minutes for each on different days. It's same day surgery, and if you do not have any previous problem with your eye, after the procedure you should see close to 20/20 vision. In general, depending on the selection of lens you agree with your doctor, you either will only need reading glasses after the surgery or none at all - so that you will become completely free from glasses. Please, I suggest that you follow-up with your doctor for a closer evaluation of what your need to correct this problem. In the meantime, you can re-check and adjust your glasses prescription if you wear one to help you focus better.
The other remote possibility for decreased focusing at night is that your cornea cells (endothial cells) works better to keep your cornea clear during the day than at night time. In general, these endothelial cells decrease with age, and therefore work less efficiently. However, this is less likely the case for you.
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Please note that this answer is for information only. It cannot be substituted for the visit to or the recommendation of your doctor.