Medically reviewed by Christine L. Larsen, MD A cataract (cloudy eye lens) blocks light from reaching the retina, which helps the brain process sight. Cataracts develop over time, gradually leading to ...

[4] Among the adrenergic agonists, a nonselective adrenergic agonist such as epinephrine can cause follicular conjunctivitis and macular edema in the aphakic eye. α2-selective adrenergic agonists ...