The diameter of the eyeball is about 2.5cm. The power of the eye lens varies from

• A. 9 D to 8 D
• B. 40 D to 32 D
• C. 44 D to 40 D
• D. None of these

The power of the eye lens is crucial for focusing light onto the retina. In a healthy human eye, the power typically ranges from about 40 diopters (D) to 60 D, depending on the individual's vision needs.

Analyzing the Options

• A. 9 D to 8 D: This range is too low for the eye lens power.
• B. 40 D to 32 D: This range is plausible but not the typical maximum.
• C. 44 D to 40 D: This range is more aligned with the higher end of eye lens power.
• D. None of these: This option suggests that all previous ranges are incorrect.

Correct Answer

The most accurate choice based on typical human eye lens power is C. 44 D to 40 D. This reflects the lens's ability to adjust focus for clear vision.