Conditions
These five pages explain the main parts of the path of light through the eye: the lens, the cornea, your prescription, the retina and the optic nerve.
The lens and cataract
The clear lens of the eye slowly clouds with age. Hazy sight, faded colours and glare at night are the signs. Most of the time there is no hurry, and how much it affects daily life decides when to operate.
Read moreThe cornea and eye surface
The cornea does most of the bending of light, so even a small problem there affects sight. From dry eye to keratoconus, and the ulcers that should not wait.
Read morePrescription and presbyopia
Short sight, long sight, astigmatism and trouble reading after forty. Who glasses, lenses and surgery each suit, and what not to expect.
Read moreThe retina and macula
The retina is where light becomes a nerve signal. Damage from diabetes, macular problems, floaters and retinal tears, and the signs to have checked the same day.
Read moreThe optic nerve and glaucoma
Glaucoma usually progresses silently and takes side vision first. Lost sight does not come back, but early diagnosis and regular treatment can often stop further damage.
Read more
The full patient guide
What to prepare for the first visit, how eye tests work, what happens on the day of surgery and after, how to use drops and lenses properly, and when to act at once.