Brain and Eye- GCSE Biology

Front

What is cataracts?

Back

A condition where the lens of the eye becomes cloudy, leading to impaired vision. It can be treated surgically by replacing the faulty lens with an artificial one.

Front

What is colour blindness?

Back

A visual impairment where individuals cannot distinguish between certain colors, often due to the malfunction of red or green cones in the retina.

Front

What is the function of the iris?

Back

The iris is the colored part of the eye that controls the size of the pupil and regulates the amount of light entering the eye.

Front

What is the optic nerve?

Back

A bundle of nerve fibers that transmits visual information from the retina to the brain.

Front

What is the retina?

Back

The layer at the back of the eye that contains photoreceptor cells (rods and cones) responsible for converting light into neural signals.

Front

What are rods and cones?

Back

Rods are photoreceptor cells in the retina that detect light intensity and are responsible for night vision. Cones detect color and are responsible for daylight vision.

Front

What is the cornea?

Back

The transparent front part of the eye that covers the iris and pupil, helping to focus light onto the retina.

Front

What are suspensory ligaments?

Back

Fibers that connect the ciliary body to the lens, holding the lens in place and helping to change its shape for focusing.

Front

What is the function of the lens?

Back

The lens is a transparent structure that focuses light onto the retina, allowing for clear vision at various distances.

Front

What is the pupil?

Back

The opening in the center of the iris that allows light to enter the eye.