A regular examination generally takes around half an hour, and checks many different elements of your vision.
Your eye care practitioner will look at your visual acuity to measure the sharpness of your vision and ability to see fine details. Most of the eye tests are carried separately for each eye. Refraction, a test to see how the eye bends light onto the retina. Short and long-sightedness and astigmatism are common eye problems resulting from refractive errors. Your field of vision will also be checked to measure the extent of the area you can see.
The examination will also check the health and function of the eyelid, pupil, retina, sclera, conjunctiva, iris, lens and cornea of each eye. Muscle functions will be tested to check how well the muscles surrounding the eyes are working. Problems with muscle function can lead to conditions such as strabismus/ squint/ crossed eyes. Lastly, fluid pressure – if fluid is not draining away from the eyes properly, pressure will build up. Excessive pressure on the eye can result in glaucoma. Retinal exam will also be carried out to check its health and status.
Advanced measuring equipment can be used to calculate a range of factors that are unique to each individual. These include the size of and distance between the pupils, visual habits and behaviour, and how the eyes move around. These parameters can then be taken into account to make sure lenses are a precise fit and provide the clearest possible vision.