Your Vision

Normal Eye

The pupil is the dark center in the middle of the iris. The pupil's function is to regulate how much light enters the eye. The pupil's size is automatically varied to regulate the amount of light entering the eye.

The iris is the coloured portion of your eye and is located behind the cornea and in front of the crystalline lens separating the anterior and posterior chambers of the eye. The iris also helps regulate the amount of light that enters your eye.

The cornea is at the front of the eye and its function is to focus and transmit light onto the retina.

The retina is the nerve layer that lines the back of your eye. It senses light and creates signals that are sent through the optic nerve to the brain transmitting the images we see.

If you have a visual problem, the first thing to determine is whether the problem is caused by a refractive error, or if there is an underlying medical condition.

Most cases of blurred vision are caused by errors of refraction caused by a disturbance in the way light rays focus within the eye.