A number of optical stores are now offering “sight tests” using automated machinery. A sight test is not a proper eye exam. Only optometrists and ophthalmologists are trained and licensed to perform a comprehensive eye exam.
The comprehensiveness and accuracy of these automated sight tests is limited. Eye muscle coordination is completely ignored and the test results can be influenced by eye fixation and alignment, pupil size, corneal or lens irregularities, and instrument myopia.
Sight tests will completely overlook many serious problems and diseases, including:
- glaucoma, which – if not diagnosed and treated at an early stage — will result in blindness.
- Type 2 diabetes, which can lead to blindness.
- brain tumour
- cancer of the eye
- high blood pressure, which can lead to stroke, heart attack and other health problems
- retinal detachment, which can lead to blindness.
Early detection of these conditions is important to be able to protect not only the health of the eyes and the clearness of vision, but also the patient’s overall health and maybe even their life.