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Having an Eye Test

Regular eye tests are important for more than just correcting your vision. They can reveal a number of other underlying problems such as glaucoma and diabetes.

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an optician testing a patient's eyes

At Asda Opticians an eye test is only £24

Or you may be entitled to this for free under the NHS (all people in Scotland are entitled to free eye tests). To see if you fall into a group that might be entitled to a free eye test, see the NHS website.

An eye test is quick, just 30 minutes

Your eye test will usually last about 30 minutes, during this time the Optical Colleague and the Optometrist will undertake a number of different tests to check your eye health.

Guide to your eye test

ASDA Opticians staff member greeting a patient who has come for an eye test
Optician from ASDA giving guidance with a smile

Arriving for your appointment

When you arrive one of our Optical Colleagues will check we have all the correct and up-to-date details for you. They will also ask you a few questions regarding your lifestyle, to help us make the right recommendations for your visual needs.

A patient having vision and eye health checks during an eye test
woman having an eye test

Non-contact tests & your health


A few puffs of air are directed at the front of each eye which then allows us to measure the eye pressure inside your eyes.


The auto-refractor looks at how well your eyes focus and it also gives the Optometrist an approximate reading of your prescription.

Visual Field Screening

This test allows us to check if you have any 'blind spots' in your field of vision. You will be asked to put your chin on a rest and look at a point in the centre of the machine. All you need to do is press a button when a small light appears on the screen.

Young girl covering eye with eye test chart in background that is used to check their vision
Girl reading the test charts

Checking your vision & eye health

During the eye examination, we will use a test chart which most people are familiar with. The Optometrist will ask you to read down the chart using different lenses to find you the clearest vision possible.

The health of your eyes are also checked by our Optometrists, they may turn the lights down very low and shine a bright light into each eye individually. This allows us to check the health of your eyes and for any health problems such as high blood pressure, diabetes and glaucoma. This is a very important part of the eye examination.

Optician holding a mirror to show patient how they look in a pair of glasses they are trying on after an eye exam
opticians discussing the health report

Your health report

At the end of the eye examination the Optometrist will advise you on the overall health of your eyes and give recommendations if glasses are required.

We normally recommend an eye examination at least every two years unless the Optometrist advises sooner.

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