Dr. Liu suggests that a normal myopic spectacle prescription, especially in children, can lead to a “hyperopic defocus,” in which the light in the peripheral retina focuses behind the retina.

What is retinal defocus?

In general, the blur or defocus signal is generally defined as the mismatch between the focal plane and the receiving (retinal) plane. Homogeneous defocus has been proven to change the growth of the eye in animals, causing myopia under negative lens and hyperopia through positive lenses.

What does Hypermetropia bilateral mean?

Hypermetropia (hyperopia, long-sightedness or far- sightedness) is a form of refractive error in which parallel rays of light coming from infinity are focused behind the light sensitive layer of the retina, when the eye is at rest.