There is a certain test that taxpayers must use to determine if they are blind for tax purposes. If you are blind for on the last day of the tax year and you do not itemize deductions, you are entitled to a higher standard deduction. You qualify for this benefit if you are totally or partly blind. If you are partly blind, you must get a certified statement from an eye doctor or registered optometrist that meets certain requirements. The IRS must be able to see this statement if requested.