There are some tests during a routine eyecare exam to determine whether prescription glasses are needed.
Visual Acuity test. It is the test that determines one ability to distinguish letter, shapes and number in various sizes and from various distances.
Glaucoma test. It is a build up of fluid in the eye that causes the retina to have pressure. Glaucoma doesn’t really have any symptoms, but over time can cause your eyes total vision loss.
Peripheral vision test. It determines the degree of side vision that a person has.
There are three professions that work with the eyes.
Opticians are persons that make the lenses, eyeglases frames and contact lenses. They analyze the prescription that the Optometrists have given. They assist with fitting eyegalsses frames and lenses.
Optometrists examine the eyes for diseases and medical conditions. They are licensed to dispense prescription glasses, contact lenses, and any needed medications.
Ophthalmologists are eye doctors that can perform any needed eye surgeries. They work very closely with the optometrist.
When the exam shows that a pair of prescription glasses are needed, the optometrist will then either help you decide which eyegasses frames and lenses best suits your specific needs, or refer you to an optician for further help.
If any of the following symptoms occur, then an eye exam needs to be scheduled.
1. the eyes are red or swollen for unknown reasons.
2.unusual headaches reoccur while reading, watching television or working on a computer.
3 .having a hard time focusing in on objects.
Also it is suggested that a person should have his or her eyes examined by an optometrist every two years or every year after the age of 60, to determine whether he or she need to wear prescription glasses.