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  2. A visual field test measures how much you can see out of the corners of your eyes. If you notice any blind spots or your visual field narrowing, this could be a sign of glaucoma or diabetic retinopathy.

    • Ishihara Test

      It’s likely that red-green colour deficiency would be picked...

  3. Use the online ZEISS Online Vision Screening Check 1, which was developed by ZEISS experts to allow you to test your eyes in an easy and fast way – for free. At the end of the test you will then receive a recommendation indicating whether you should consult a ZEISS optician for professional advice.

  4. A visual field test is a way to measure what you can see above, below and all-around. Visual field tests are specifically used to detect areas of vision loss (blind spots). If you have previously had vision loss problems, these tests can also be used to monitor the progression.

  5. With just a few clicks on your computer screen or even your phone, you can test your visual acuity, estimate refractive errors, and go on to renew an expired eyeglass or contact lens prescription, hassle-free.

    • Eye Pressure Test
    • Gonioscopy
    • Visual Field Test
    • Optic Nerve Assessment

    An eye pressure test (tonometry) uses an instrument called a tonometer to measure the pressure inside your eye. The optometrist will put a small amount of painkilling medicine (anaesthetic) and dye into the front of your eye. They will then shine a light into your eye and gently touch the surface of it with the tonometer. Some optometrists use a di...

    Gonioscopy is an examination to look at the front part your eye – the fluid-filled space between the coloured part (iris) and the clear window of the front of the eye (cornea). This is where the fluid should drain out of your eye. A gonioscopy can help to determine whether this area (the "angle") is open or closed (blocked), which can affect how fl...

    A visual field test (sometimes called perimetry) checks for missing areas of vision. You may be shown a sequence of light spots and asked to press a button to indicate which ones you can see. Some dots will appear at the edges of your vision (your peripheral vision), which is often the first area to be affected by glaucoma. If you can't see the spo...

    The optic nerve, which connects your eye to your brain, can become damaged in glaucoma, so an assessment may be carried out to see if it's healthy. For the test, eyedrops will be used to enlarge your pupils. Your eyes are then examined using either: 1. a slit lamp (a microscope with a bright light) 2. optical coherence tomography – a type of scan w...

  6. www.nhs.uk › conditions › retinal-migraineRetinal migraine - NHS

    Check if it's a retinal migraine. Retinal migraines usually affect 1 eye. They often come on suddenly and symptoms include: vision loss – this usually lasts around 10 to 20 minutes but can sometimes last up to 1 hour; a blind spot in your vision; a headache – you may get this at the same time as the eye symptoms or shortly afterwards

  7. Regular sight tests. If you have vision loss, it's still important to have regular sight tests so your optometrist (eye specialist) can check for further changes in your eyes and give you advice about how to make the best use of your vision. Find an optician or more about NHS eyes services.