During overminused refraction, which image is perceived as clearer?

During overminused refraction, which image is perceived as clearer?

• A. Red image
• B. Green image
• C. Both images equally clear
• D. Neither image is clearer

Answer: (B)

Chromatic aberration in the eye means different colors focus at slightly different depths: green light tends to focus closer to the retina, while red light focuses a bit behind it. When you overminuse, the overall optical power is more negative, pushing the image focus back toward the retina. Because green light’s focal point is nearer the retina, this backward shift brings the green image into sharper focus more readily than the red image, whose focus lies behind the retina. So the green image appears clearer under overminused refraction.

Chromatic aberration in the eye means different colors focus at slightly different depths: green light tends to focus closer to the retina, while red light focuses a bit behind it. When you overminuse, the overall optical power is more negative, pushing the image focus back toward the retina. Because green light’s focal point is nearer the retina, this backward shift brings the green image into sharper focus more readily than the red image, whose focus lies behind the retina. So the green image appears clearer under overminused refraction.