Types of Eye Tests

The NHS recommends that most adults have a routine eye test at least every two years. If you are over 70, have diabetes, a family history of glaucoma, or wear contact lenses, you may need more frequent tests — typically once a year. Children should have annual eye tests throughout their school years.

Many people qualify for free NHS-funded eye tests. Eligible groups include children under 16 (or under 19 in full-time education), adults aged 60 and over, people with diabetes or glaucoma, those receiving qualifying benefits such as Universal Credit or Income Support, and people aged 40+ with an immediate family member diagnosed with glaucoma.

In the UK, the terms are generally used interchangeably. A standard eye test (or sight test) includes both a check of your vision and an examination of the health of your eyes. Some opticians offer enhanced examinations with additional technology such as OCT scans or retinal photography, which provide a more detailed assessment.

A standard eye test typically takes 20 to 30 minutes. Specialist tests such as contact lens fittings, dry eye assessments, or myopia management consultations may take longer — usually 30 to 60 minutes. Quick add-on tests like retinal photography or OCT scans only add a few extra minutes.

Bring your current glasses or contact lenses, a list of any medications you take, and your NHS exemption certificate or benefit documentation if you qualify for a free test. If you have had a previous prescription, bring that along too so your optometrist can track changes over time.

After a standard eye test you can usually drive home immediately. However, if your optometrist uses dilating drops (common in diabetic eye screening, some children’s eye tests, and cataract assessments), your vision will be blurry for several hours afterwards and you should not drive until it clears. Ask your optician in advance whether drops will be used so you can arrange alternative transport if needed.