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What are cataracts? Just as there is a lens in glasses to focus, there is a lens inside the eye to focus. When you are born this lens is clear and elastic, and changes shape to bring images into sharp…

Cataract Patient Information Animations

The pupil is the central opening of the iris that allows light into the eye. The size of the pupil is determined by two muscle systems in the iris. One is a circumferential muscle called the ‘sphincter pupillae’. When it…

Acute glaucoma is much better understood than chronic glaucoma. It is a mechanical blockage of fluid trying to exit the eye. It occurs suddenly, and within hours causes the eye pressure to raise so much that the eye becomes red,…

There are a number of different types of glaucoma. The commonest type of glaucoma is ‘chronic’ or ‘primary’ glaucoma. This is damage to the nerve of the eye that can be reduced by lowering the pressure within the eye. A…

The eye is a fluid filled structure. Just like a football or tyre, it can be under filled and soft, or over filled and hard. The fluid that fills the eye is known as aqueous fluid. This is made at…

The eye is lined by a thin layer of black pigmentation which absorbs stray light. This layer forms the back of the iris and is a continuous sheet that extends from the back of the iris, covers the ciliary body,…

The front surface of the eye is a clear window known as the cornea. It is 0.5mm thick in the centre and 1mm thick at the periphery. It is a 3 layer structure. On the front surface it has a…

The front surface of the eye is a clear window known as the cornea. It is 0.5mm thick in the centre and 1mm thick at the periphery. Behind the cornea sits the iris and pupil. Infections of the cornea are…

The surface of the eye is the most sensitive surface of the body. Any soreness or scratch to the surface can be very painful. Even minor scratches are often so painful that grown men cannot open their eye without anaesthetic…