Biology Practical: Dissection of an Eye

GCSE Biology Practical - Dissection of an Eye

By dissecting an eye, you are able to practically investigate the general structure of the eye, and this can give students a better understanding of the way the various parts of the eye work.

GCSE Biology practical - Eye Dissection

1. Have a good look at the Eye and to identify any parts of the Eye.
2. Cut away any fat or muscle on the outside of the eye. Make your first incision into the cornea and cut until the clear liquid is released underneath.
3. Use the scalpel to continue the incision through the sclera. Then use scissors to cut around the middle of the Eye, sothat the Eye is cut in half.
4. Pull out the iris which is located between the cornea and the lens. It may be still attached to the cornea, or have stayed with the back of the Eye. Once located, pull the iris out, it should stay in one piece. You will see a hole in the centre of the iris, this is the pupil. The back of the Eye is filled with a liquid mixture of protein and water.
5. Remove the lens. This should be a clear lump, which feels soft on the outside and hard in the middle.
6. Examine the back half of the eye, you should be able to see some thin blood vessels that are part of a thin fleshy film, this film is the retina. The retina should be attached only at one point of the Eye. This spot is the blind spot.
7. Turn the back of the Eye over, and by looking at the other side of the back of the Eye you should be able to locate the optic nerve.

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