Heterophoria

Heterophoria is a tendency for the eyeballs to deviate from parallel axes. Under normal circumstances, both eyes work together, simultaneously looking at the same point, but if you cover one eye with your hand, it will move away from the original parallel axis, while the other eye continues to look at an object. If you remove your hand, the second eye will immediately return to its previous normal position.

Most people have a mild degree of heterophoria called exophoria, in which the closed eye begins to move outward, away from the nose (compared to esophoria).

Heterophoria often leads to excessive eye strain, which develops as a result of a person’s unconscious efforts to look straight with both eyes.

See also Strabismus.

Heterophoria is the tendency for the eyeballs to deviate from parallel axes. Under normal circumstances, both eyes work together, looking at the same point at the same time. However, if you cover one eye with your hand, it will move away from the original parallel axis, while the other eye will continue to examine any object. If you remove your hand, the second eye will immediately return to its previous normal position.

Most people have a mild degree of heterophoria called exophoria, in which the closed eye begins to move outward, away from the nose (compared to esophoria).

Heterophoria often leads to excessive eye strain, which develops as a result of a person’s unconscious efforts to look straight with both eyes.

See also Strabismus.

Heterophoria.

Heterophoria is the tendency for the eyeballs to deviate in different directions from parallel axes when a person looks at an object. When the eyes are looking at an object, both eyes work simultaneously, but if one eye is closed, the other eye will begin to deviate from its original position. However, as soon as the hand is removed, the second eye returns to its original position.

Most people have a slight degree of heterophoria called exophoria, in which the eye begins to deviate outward, away from the nose. Heterophoria can lead to excessive eye strain and the development of unconscious attempts to look straight.

What is heterochromatin?

Heterochromatin is chromatin that can be more intensely colored in interphase than euchromatin. It is believed that it does not contain genes and is not involved in DNA replication. Heterochromatin is often associated with inactive regions of chromosomes, which can be used to regulate gene expression.