WebIris definition, the contractile, circular diaphragm forming the colored portion of the eye and containing a circular opening, the pupil, in its center. See more. WebThe iris is made of muscles and nerves. The nerves and muscles in your iris work on their own without you thinking about them (parasympathetically) to control the size of your pupil. Your iris is filled with a fluid called aqueous humor. Your eye constantly produces and … Horner syndrome, also known as oculosympathetic palsy or Bernard …

IRIS English meaning - Cambridge Dictionary

WebSep 15, 2024 · Keratitis is an inflammation of the cornea — the clear, dome-shaped tissue on the front of your eye that covers the pupil and iris. Keratitis may or may not be associated with an infection. Noninfectious keratitis can be caused by a relatively minor injury, such as from wearing your contact lenses too long or getting a foreign body in the … WebThey provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and convert it into electro … hja8630

Iris Definition & Meaning - Merriam-Webster

WebFeb 24, 2024 · The lens of the eye, also called the crystalline lens, is an important part of the eye’s anatomy that allows the eye to focus on objects at varying distances. It is located behind the iris and in front of the vitreous body. In its natural state, the lens looks like an elongated sphere — a shape known as ellipsoid — that resembles a ... Webiris definition: 1. a tall plant that has blue, yellow, or white flowers and long, narrow leaves 2. the coloured…. Learn more. Webiris meaning: 1. a tall plant that has blue, yellow, or white flowers and long, narrow leaves 2. the coloured…. Learn more. hjaalmarch