The healthcare provider may also ask about other symptoms, such as headache , nausea , vomiting , weakness , or muscle pains. Presbyopia means difficulty seeing things up close, due to age-related changes in the eye. This condition affects almost all people over age 50. It's the reason older people often need bifocals or reading glasses. Sometimes, no cause can be found.
Prevention is depends on the cause.
Early detection and treatment of glaucoma can often prevent vision loss. Control of diabetes can help prevent vision changes. Frequent hand washing and not touching the eyes with the hands helps prevent conjunctivitis. Many cases of vision changes cannot be prevented. A history and physical exam, including an examination of the eye , are done first.