What type of vision issue is indicated by the mix of plus and minus lens requirements in both eyes?

The presence of both plus and minus lens requirements in each eye indicates that one eye requires correction for hyperopia (farsightedness) while the other eye needs correction for myopia (nearsightedness). This condition is known as antimetropia.

In antimetropia, one eye focuses light in front of the retina (myopia), while the other eye focuses light behind the retina (hyperopia). As a result, a person with antimetropia may experience issues with depth perception, as each eye has different refractive errors that can lead to difficulty in achieving a clear image. Proper corrective lenses are crucial for balancing vision between the two eyes and ensuring clear and comfortable sight.

Monovision, on the other hand, typically refers to a strategy often used in contact lens fitting for presbyopia correction, where one eye is corrected for distance vision and the other for near vision, which differs from the optical requirements demonstrated in antimetropia. Astigmatism involves an irregular curvature of the cornea leading to distorted vision but does not specifically explain the mix of plus and minus lens requirements. Myopia alone would only require minus lenses for distance vision correction without the counters of plus lenses involved.