How the eye focuses light flashcards

What is the cornea?

The cornea is the clear, front layer of the eye that helps focus light.

Function of the lens?

The lens further focuses light onto the retina, adjusting for distance.

True or false: The iris controls pupil size.

True, because it adjusts the amount of light entering the eye.

Difference between rods and cones?

Rods detect low light levels; cones detect color and detail.

What is accommodation?

Accommodation is the eye's ability to change focus for near or far objects.

Fill in the blank: Light enters through the _____ before reaching the lens.

cornea

What is the retina?

The retina is the light-sensitive layer at the back of the eye.

Question: How does light travel through the eye?

Light passes through the cornea, pupil, lens, and reaches the retina.

True or false: The vitreous humor helps maintain eye shape.

True, because it fills the eye and provides support.

Question: What happens to light rays when focusing on a distant object?

The lens flattens, allowing light rays to converge on the retina.

What role do photoreceptors play?

Photoreceptors (rods and cones) convert light into electrical signals for the brain.

Question: What is the blind spot?

The blind spot is where the optic nerve leaves the retina, lacking photoreceptors.

Fill in the blank: The _____ adjusts the eye's focus for varying distances.

lens

What is refraction?

Refraction is the bending of light as it passes through different media, like the cornea and lens.