Final answer:
Untreated Morgagnian cataracts can lead to visual impairment and ultimately to blindness. Treatment generally involves lens replacement.
Step-by-step explanation:
The main complication that occurs if a Morgagnian cataract is not treated is visual impairment, which can eventually lead to complete blindness. Cataracts are a clouding of the lens in the eye that can significantly reduce the amount of light reaching the retina, leading to difficulties in vision. Vitamins A and C are known to be protective against the formation of cataracts, and while cataracts are commonly age-related, repeated exposure to UV-B has also been associated with the development of cataracts. Treatment typically involves the replacement of the clouded lens with a plastic lens.