Astigmatism, strabismus, conjunctivitis, ophthalmia, and presbyopia are disorders affecting what organ?

• A. The Eye
• B. The Ear
• C. The Skin
• D. The Nose

Answer: (A)

All of these terms refer to conditions of the eye, the organ that detects light and enables vision. Astigmatism happens when the cornea or lens has an irregular curvature, causing blurry or distorted vision. Strabismus is when the eyes don’t align properly, which can lead to double vision or suppression of one eye. Conjunctivitis is inflammation of the conjunctiva, the clear tissue covering the white of the eye, resulting in redness and irritation. Ophthalmia is another term describing inflammation of the eye, often used historically for infections or inflammatory eye conditions. Presbyopia is age-related difficulty focusing on near objects due to the lens becoming less flexible. Since these conditions all affect the eye, the organ involved is the eye.