Does blindness in the left side of each eye qualify for a tax deduction? Right side is mostly normal in the right side of each eye

Anyone whose field of vision falls at or below 20 degrees, who wears corrective glasses but whose vision is 20/200 or less in their best eye, or who has no eyesight at all, meets the legal definition of being blind and is eligible for certain deductions.

There is not a deduction for blindness.  However, you can get an increase in your Standard Deduction for being blind, but your condition must be as noted in the IRS instructions -

Blindness
If you weren’t totally blind as of December 31, 2023, you must get a statement certified by your eye doctor (ophthalmologist or optometrist) that:
• You can't see better than 20/200 in your better eye with glasses or contact lenses, or
• Your field of vision is 20 degrees or less.
If your eye condition isn't likely to improve beyond the conditions listed above, you can get a statement certified by your eye doctor (ophthalmologist or optometrist) to this effect instead.
You must keep the statement for your records

You are considered blind if: 

1. You cannot see better than 20/200 in your better eye with glasses or contact lenses, or
2. Your field of vision is not more than 20 degrees.
3. See IRS Blind
4. If you or your spouse were age 65 or older or blind at the end of the year, be sure to claim an additional standard deduction by checking the appropriate boxes for age or blindness on Form 1040, U.S. Individual Income Tax Return or Form 1040-SR, U.S. Tax Return for Seniors.