Certified Ophthalmic Medical Technologist (COMT)

Answer: C - If a patient has a cataract, sharp vision cannot be provided with the correct diopter strength.

No diopter strength will give crisp vision to someone with an eye disease like a cataract or age-related macular degeneration. In these situations, the retina receives accurate light focus from the glasses or contact lenses, but the eye structures obstruct proper light processing.