What condition results from loss of transparency of the lens of the eye?

The correct answer is cataract formation, which occurs when the lens of the eye becomes cloudy or opaque, leading to a loss of transparency. This clouding can interfere with the passage of light through the lens, causing vision to become blurred or dim. Cataracts are typically age-related but can also result from various factors such as diabetes, prolonged use of corticosteroids, or exposure to ultraviolet (UV) light.

In contrast, glaucoma is a group of eye conditions that damage the optic nerve, often due to increased intraocular pressure, and is not characterized by lens opacity. Retinopathy refers to damage to the retina, often caused by diabetes or hypertension, and involves changes to the retinal blood vessels, not the lens. Dermatitis is a skin condition characterized by inflammation and does not pertain to the eye's lens. Understanding the specific conditions and their characteristics is essential for making accurate diagnoses in ophthalmology.