Pupil Center

Synonyms

Pupillary center

Definition

Center of pupillary aperture.

Basic Characteristics

The pupil of the eye is a critical limiting factor in the optics of the visual system. When the pupil changes its size, it controls not only the amount of light available to the visual system but also the optics of the eye.

The exact size and location of the pupil are important in corneal refractive surgery.

In keratorefractive procedures, the relationship between the size and location of the optical zone and the pupil is crucial for a successful visual outcome. If the corneal ablation becomes decentered with pupils of large diameter, the patient may complain about glare, halos, or starbursts under low illumination.

There have been several studies of the change in centration of the pupil with changing size, with the center of the pupil moving slightly nasally and superiorly as the pupil constricted (Yang et al. 2002).

According to the recommendations of the Optical Society of America working group...