The Science Behind Sight Comprehension Flashcard

Front

What is the primary function of the eye?

Back

The primary function of the eye is to receive light and convert it into electrical signals that are sent to the brain, allowing us to see.

Front

What are the two main types of photoreceptor cells in the retina?

Back

The two main types of photoreceptor cells in the retina are rods and cones. Rods are responsible for vision in low light, while cones are responsible for color vision and detail.

Front

What is the role of the cornea in the eye?

Back

The cornea is the transparent front part of the eye that helps to focus light onto the retina.

Front

How do the lenses in glasses correct vision?

Back

The lenses in glasses are curved to bend light rays in a way that compensates for the user's vision problems, allowing them to see clearly.

Front

What is the difference between luminous and non-luminous objects?

Back

Luminous objects emit their own light, while non-luminous objects do not emit light but can reflect light from luminous sources.

Front

What happens to cat pupils in low light conditions?

Back

In low light conditions, cat pupils dilate (become very big and wide) to allow more light to enter the eye.

Front

What is the function of the tear duct?

Back

The tear duct is responsible for draining tears from the eye into the nasal cavity.

Front

What is the significance of having eyes positioned at the front of the head in predators like lions?

Back

Having eyes positioned at the front of the head allows for better depth perception and binocular vision, which is important for hunting.

Front

What is the blind spot in the eye?

Back

The blind spot is the area on the retina where the optic nerve exits the eye, and there are no photoreceptor cells, resulting in a lack of vision in that area.

Front

How does light travel through the eye?

Back

Light travels through the cornea, then through the pupil, is focused by the lens, and finally reaches the retina where it is converted into electrical signals.