Sight tests, with 30 minutes on the clock
NHS and private sight tests, 30 minutes each so nothing is rushed. Most exams include a 3D OCT retinal scan: a layered cross-section of the retina, optic nerve and macula that picks up early macular degeneration, glaucoma changes and diabetic retinopathy before the naked eye can. Children's eye exams free under the NHS Wales sight test.