The eye is a paired organ with a diameter of 22-24 mm, situated in the eye socket and protected by the eyelids.

Its shape is determined by the sclera and the cornea.

The sclera is a very strong fibrous tissue, which is translucent through the conjunctiva, containing tiny capillaries that cover it.

The cornea has five layers and is transparent with a thickness of 0.8 - 0.9 mm at the edges, while in the middle, where most laser treatments take place, it is about 0.5 - 0.6 mm thick.

The space between the back surface of the cornea and the iris makes up the anterior chamber, which is connected with the space between the iris and the eye lens - with the posterior chamber - through the pupil.

These two cavities are filled with the vitreous humour (eye-water), which plays an important role in the oxygen and nutrient supply of the internal media of the eye and also in the formation of internal pressure in the eye.

The eye lens is located behind the iris and its opening, the pupil.
The alteration of the shape of the lens and its fine movements allow accommodation to near or distant objects.

The largest part of the eye is filled by the transparent vitreous body.
The retina lines the posterior part of the eye, which is 0.1 - 0.4 mm thick.

Its 10 layers of tissue are responsible for the reception of the optical information coming into the eye and also, through the optic nerve, carrying the impulse towards the brain.

Printer-friendly versionPrinter-friendly version