This is straight from the VA website:
https://www.va.gov/opa/publications/benefits_book/benefits_chap01.asp
VA medical services include diagnostic audiology and diagnostic and preventive eye care services. VA will provide hearing aids and eyeglasses to the following Veterans:
- Those with any compensable service-connected disability.
- Those who are former Prisoners of War (POWs).
- Those who were awarded a Purple Heart.
- Those in receipt of benefits under Title 38 United States Code (U.S.C.) 1151.
- Those in receipt of an increased pension based on being rated permanently housebound or in need of regular aid and attendance.
- Those with vision or hearing impairment resulting from diseases or the existence of another medical condition for which the Veteran is receiving care or services from VHA, or which resulted from treatment of that medical condition, e.g., stroke, polytrauma, traumatic brain injury, diabetes, multiple sclerosis, vascular disease, geriatric chronic illnesses, toxicity from drugs, ocular photosensitivity from drugs, cataract surgery, and/or other surgeries performed on the eye, ear, or brain resulting in vision or hearing impairment.
- Those with significant functional or cognitive impairment evidenced by deficiencies in the ability to perform activities of daily living. but not including normally occurring visual or hearing impairments. Note: Veterans with normally occurring visual and/or hearing impairments that interfere with their medical care are eligible for eyeglasses and hearing aids.
- Those who have vision or hearing impairment or combined visual and hearing impairments severe enough that it interferes with their ability to participate actively in their own medical treatment. Note: The term "severe" is to be interpreted as a vision and/or hearing loss that interferes with or restricts access to, involvement in, or active participation in health care services (e.g., communication or reading medication labels). The term is not to be interpreted to mean that a severe hearing or vision loss must exist to be eligible for hearing aids or eyeglasses.
- Veterans who have a service-connected hearing disabilitiy that contributes to a loss of communication ability. However, hearing aids are to be provided only as needed for the service-connected hearing disability. Nonservice-connected (NSC) Veterans are eligible for hearing aids or eyeglasses on the basis of medical need. All such Veterans (including Medal of Honor recipients who do not have entitling conditions or circumstances and catastrophically disabled Veterans) must receive a hearing evaluation by a state-licensed audiologist prior to determining eligibility for hearing aids or an appropriate evaluation by an optometrist or ophthalmologist prior to determining eligibility for eyeglasses to establish medical justification for provision of these devices. These Veterans must meet the following criteria for eligibility based on medical need:
- Be enrolled at VA medical facility where they receive their health care; and
- Have hearing or vision loss that interferes with or restricts communication to the extent that it affects their active participation in the provision of health care services as determined by an audiologist or an eye care practitioner or provider.