Medical Term for Farsightedness
The medical term for farsightedness is hyperopia. 1
Definition and Optical Mechanism
Hyperopia is a refractive error (ametropia) in which parallel light rays from distant objects converge incompletely before striking the retina 1. In simpler terms, the focal point falls behind the retina rather than directly on it, resulting in blurred vision, particularly for near objects.
Clinical Classification
The severity of hyperopia is categorized based on diopter measurements 1:
- Low to moderate hyperopia: Less than 3.00 diopters (D)
- High hyperopia: 3.00 D or more
Important Clinical Context
While hyperopia is the standard medical terminology, you may encounter related terms in clinical practice:
- Nanophthalmos: An extreme form of hyperopia (refractive error +8.00 to +25.00 diopters) caused by insufficient axial eye growth, where the cornea and lens are positioned too close to the retina 2
- Presbyopia: Often confused with hyperopia by patients, but this is an age-related condition affecting near accommodation rather than a true refractive error 1
Key Distinction
Presbyopia develops with aging and causes difficulty with near work even when distance vision is fully corrected, whereas hyperopia is present throughout life and affects the eye's baseline refractive state 1.