Incipient cataract involves what percentage of the lens volume?

Incipient cataract involves what percentage of the lens volume?

• A. 15-29%
• B. 50-70%
• C. 90-100%
• D. Less than 15% of lens volume (correct)

Answer: (D)

This question tests understanding of cataract staging in relation to how much of the lens is involved. Incipient cataract is the earliest detectable stage, where opacification begins but only a small portion of the lens is affected. Because the change is minimal, it typically involves less than about 15% of the lens volume. As cataracts progress, more of the lens becomes opaque, moving through immature stages (larger portions involved) to mature (most or all of the lens involved). The higher percentages listed correspond to more advanced stages, not the initial incipient stage, so the less-than-15% range is the best fit.

This question tests understanding of cataract staging in relation to how much of the lens is involved. Incipient cataract is the earliest detectable stage, where opacification begins but only a small portion of the lens is affected. Because the change is minimal, it typically involves less than about 15% of the lens volume. As cataracts progress, more of the lens becomes opaque, moving through immature stages (larger portions involved) to mature (most or all of the lens involved). The higher percentages listed correspond to more advanced stages, not the initial incipient stage, so the less-than-15% range is the best fit.