Your optometrist will ask you to look into a machine while the scan takes place - it takes just a few seconds to complete. Many of these conditions, such as glaucoma and diabetic retinopathy, form at the very back of the eye so it's really helpful to be able to take a much closer look using the scan results. Using light waves to create a 3D image of your eye, it can help our optometrists spot signs of eye health issues up to four years earlier than traditional methods. OCT (Optical Coherence Tomography) is a hospital-grade eye scan that helps us to view the structures of your eye in even greater detail. OCT scan: Ask your local store if they offer OCT scanning so you can add it to your normal eye test. Visual field tests are often used to detect early stages of glaucoma or any conditions that could be associated with headaches and other health issues. Visual field check: This test will assess your ability to detect flashes of light in your peripheral vision. It is a particularly important check for contact lens wearers. Your optometrist will use this to check for abnormalities or scratches on your cornea, iris and lens. Slit lamp test: A slit lamp (also known as a Volk lens) is a powerful microscope that is used to examine the front surface of the eyes. Ophthalmoscope: This specialist torch is used to examine the retina at the back of the eye, your optic nerve and its blood vessels to make sure they are healthy. This use of lenses is known as refraction and lets the optometrist know which strength prescription gives you the best vision possible. how well you can see with and without lenses in front of your eyes. This test measures your visual acuity, i.e. Vision test: To fine-tune their findings, the optometrist will ask you to read from a Snellen test chart, that's the one with the letters that get smaller. They will then place a number of different lenses in front of each eye to calculate a prescription for each eye. While looking at the red and green light in the distance, your optometrist will shine a light in each eye. This test can also be used with children or for someone who cannot easily describe their vision. Retinoscopy: This is used to get an estimate of the ability of your eyes to focus and can be used to assess how long- or short-sighted you are. Treatments for any eye conditions are also discussed at this point, as well as possible referral to a specialist. This could be a simple ‘all clear’ on the eye health front, or they might talk you through particular lens options to match your prescription and lifestyle. Once all the relevant tests have been carried out, your optometrist will be able to discuss the results and offer any advice. These are known as pre-tests and help to make the process more efficient. Some of the common tests, like the visual field test and the eye pressure test (puff of air test), can be performed by an optical assistant on behalf of the optometrist before the eye examination. Some are common to all eye tests – for example, the letter chart indicates how clearly you can see – while others may be used when further investigations are required, for example, to check if your eyes can see colour normally. We use a variety of tests and equipment to assess different aspects of your eye health and vision. All this information helps them to tailor the examination to best suit your needs. Your optometrist will ask about your general health, medications, any past treatment on your eyes, or if there are any family members with eye conditions. This gives you the opportunity to discuss any concerns you have about your eyes, vision or current glasses, and whether you’re experiencing any symptoms which might need further investigation. There are three main parts involved in our typical eye tests: History and symptoms
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