Which term describes the condition of lacking a natural crystalline lens?

Which term describes the condition of lacking a natural crystalline lens?

• A. Aphakic
• B. Astigmatism
• C. Myopia
• D. Aphakia

Answer: (D)

When the natural crystalline lens is missing, the eye is described by the term aphakia. This noun form specifically denotes the absence of the lens itself. The adjective aphakic can describe a person or eye that lacks a lens, but the condition itself is aphakia, which is why it’s the best fit for describing the situation. For context, aphakia occurs after cataract removal or due to certain congenital conditions. Without the lens, most of the eye’s focusing power is lost, leading to significant refractive changes that typically require corrective lenses or an intraocular lens implant for proper vision. The other terms refer to different refractive issues: astigmatism involves irregular curvature causing distorted vision, and myopia is nearsightedness.

When the natural crystalline lens is missing, the eye is described by the term aphakia. This noun form specifically denotes the absence of the lens itself. The adjective aphakic can describe a person or eye that lacks a lens, but the condition itself is aphakia, which is why it’s the best fit for describing the situation.

For context, aphakia occurs after cataract removal or due to certain congenital conditions. Without the lens, most of the eye’s focusing power is lost, leading to significant refractive changes that typically require corrective lenses or an intraocular lens implant for proper vision. The other terms refer to different refractive issues: astigmatism involves irregular curvature causing distorted vision, and myopia is nearsightedness.