What Is Night Blindness?

Night blindness, or nyctalopia, is a condition affecting the eye's ability to see in low light due to issues with the rods in the retina. It is not a disorder itself but a symptom of other conditions like cataracts, nearsightedness, or vitamin A deficiency. Treatments vary from nutritional improvements to surgery.

What is the primary function of rods in the human eye?

• Regulating eye pressure

• Focusing on distant objects

• Detecting color

• Detecting light and shades of gray

Which of the following is NOT a cause of night blindness?

• Vitamin C deficiency

• Issues with the pupil

• Cataracts

• Nearsightedness

How do cataracts affect night vision?

• By improving focus in low light

• By enhancing color perception

• By blocking or bending light

• By increasing light sensitivity

What is rhodopsin, and why is it important for night vision?

• A light-sensitive protein necessary for rods to function

• A type of lens that focuses light

• A muscle that controls pupil size

• A vitamin that enhances color vision

Which foods are rich in vitamin A, which is crucial for preventing night blindness?

• Apples and grapes

• Oranges and bananas

• Broccoli and cauliflower

• Carrots and spinach