Question

Around age 40, adults ___________. see a decline in sexual functioning may need to wear bifocal lenses experience a sharpening of the senses experience a noticeable decline in hearing do not experience any physical changes

Answer 1

At age of 40 the lens of the eye begins to harden. The eye also has difficulty changing shape to focus during this age. This is the reason why
Around age 40, adults may need to wear bifocal lenses or in other word, they may need to wear eyeglasses with two distinct optical powers.