A pupil is the opening created by the iris, which widens and narrows to control the amount of light that enters the eye. Pupil size can vary between people, but they should be round, equal in size ...

Recently, single-pass four-throw (SFT) pupilloplasty has been used for various indications of iris-pupil diaphragm repair. In this column, we discuss a few modifications in SFT. Figures 1a and 1b.

There's an average pupil size that's considered normal. Measured in millimeters, your eyes' pupils can change based on light, medications, and even emotions.

By adjusting the distance of the disks from the bulb, the size of the iris and pupil can be changed. A camera system picks out objects (like people) and directs the eye to gaze at them.

The iris is the colored part of the eye that surrounds the pupil. In this article, learn more about the part of the eye responsible for seeing color, its anatomy, and functions.

The pupil expander is positioned centrally and gently pushed at each angle to trap the iris in the four loops. “We obtain a stable 5.5 mm to 6 mm pupil dilation, which is sufficient to perform ...

Your iris (the colored part of your eye) opens and closes to change the size of the pupil. Miosis can occur in one or both eyes. When it affects only one eye, it’s also called anisocoria.

When your pupil shrinks (constricts), it's called miosis. If your pupils stay small even in dim light, it can be a sign that things in your eye aren't working the way they should.

An eye injury can damage nerves or the muscles in your iris that control your pupil size. That can also happen after eye surgery, such as cataract removal or corneal transplant . Benign Episodic ...