Final answer:
The free-radical metabolites from the phototoxic reaction of phenothiazine with UV-B light can lead to opacification in the cornea, lens, and vitreous humor. UV-B exposure can also cause cataracts, but they can be treated by replacing the lens with a plastic lens. Eye protection from UV is important, and sunglasses with plastic lenses are more effective.
Step-by-step explanation:
The free-radical metabolites produced from the phototoxic reaction of phenothiazine (chlorpromazine) with UV-B light can lead to opacification in the c) Cornea, lens, and vitreous humor.
Repeated exposure to UV-B may also lead to the formation of cataracts in the eyes, which are clouding in the eye's lens and a loss of vision. However, cataracts can be treated by replacing the lens of the eye with a plastic lens. Prevention is important, and eye protection from UV is more effective with plastic sunglasses than those made of glass.
In addition, there are other optical effects used in sunglasses, such as colored pigments embedded in them, non-reflective or reflective coatings, and photochromic lenses that darken in the sunlight and become clear indoors.