BIOLOGY - Physiology - Eye and four vision problems

The video discusses the sensitivity of animals and plants to environmental changes, focusing on human senses and vision problems. It explains how receptor cells in sense organs detect stimuli and relay information to the central nervous system. The video covers four vision problems: color blindness, glaucoma, cataracts, and diabetic retinopathy, detailing their causes, effects, and treatments. Color blindness affects color perception due to issues with cone cells. Glaucoma involves optic nerve damage from eye pressure, often symptomless but detectable through eye tests. Cataracts cause cloudy vision, treatable by surgery. Diabetic retinopathy results from high blood sugar damaging retinal blood vessels.

Which of the following is NOT one of the five human senses?

• Taste

• Balance

• Hearing

• Sight

What is the primary function of rod cells in the human eye?

• Detecting colors

• Detecting light intensity

• Focusing images

• Protecting the retina

Color blindness primarily affects which type of cells in the retina?

• Rods

• Bipolar cells

• Cones

• Ganglion cells

What is a common symptom of cataracts?

• Double vision

• Sudden vision loss

• Cloudy or blurry vision

• Eye pain

Diabetic retinopathy is primarily caused by damage to which part of the eye?

• Optic nerve

• Lens

• Cornea

• Retina