Retina | MCQs

Explanation

• Rod cells are responsible for vision in low light conditions, such as at night or in dimly lit environments.
• They are more sensitive than cone cells and can detect even a single photon of light.

Explanation

• Vitamin A (specifically, retinal) is necessary for the formation of rhodopsin, a light-sensitive pigment in the retina of the eye.
• Rhodopsin is responsible for black-and-white vision and is found in the rod cells of the retina.
• Vitamin A deficiency can lead to night blindness, a condition where people have difficulty seeing in low light environments.

Explanation

Retina: The retina is the light-sensitive tissue at the back of the eye.

The retina converts light into electrical impulses that are sent to the brain through the optic nerve.

Vitreous gel: The vitreous gel is a transparent, colorless mass that fills the rear two-thirds of the eyeball, between the lens and the retina.

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RY24012023

Explanation

The retina is the innermost layer of the eye that senses light and sends visual signals to the brain, much like the film in a camera captures images.

Explanation

• The optic nerve is the nerve that carries visual information from the retina to the brain.
• Where it is interpreted and understood.
• It is responsible for transmitting electrical signals from the photoreceptors in the retina to the brain.
• It allowing us to see and interpret visual information.

Explanation

• The retina is the innermost layer of the eye that senses light and sends visual signals to the brain.
• It's is also known as "screen of the eye".
• Because it is where the light rays are finally focused and interpreted as visual information.