What are iseikonic lenses designed to correct?

Iseikonic lenses are specifically designed to correct image size discrepancies between the two eyes. This condition can result from a variety of issues, such as aniseikonia, where one eye perceives objects as larger or smaller than the other. Iseikonic lenses work by altering the size of the images projected onto the retina, effectively balancing the perception of size between the two eyes. This adjustment helps in creating a more unified visual experience, reducing discomfort and strain that can arise from these discrepancies.

In contrast, other options like farsightedness, color blindness, and angle kappa address different aspects of vision correction and are not related to the issue of image size differences. Farsightedness involves the ability to focus on nearby objects, color blindness pertains to the inability to perceive certain colors accurately, and angle kappa relates to the alignment of the optical axis of the eye with the visual axis. These conditions require different types of lenses or corrections, making iseikonic lenses uniquely suited for correcting discrepancies in perceived image size.