It is the muscular curtain that sits near the front between the cornea and the lens. The iris determines the size of the ...

They also tend to have pupils that open ... two different kinds of light receptor cells—rods and cones. (Both are named after their relative shapes.) Cones work in bright light and register ...

Even when we are near a window and have no need for electric lights because the daylight is bright enough to read and work ..

Introduction Changes to the pupillary light reflex (PLR) have been demonstrated in traumatic brain injury and in adolescents with a history of concussion. Assessment of changes to the PLR following ...

The amount of light entering the eye is controlled by a reflex action. The size of the pupil changes in response to bright or dim light. This is controlled by the muscles of the iris.

Reflexes. The pupillary light response test is used to evaluate cranial nerves II and III but is not an absolute test of vision. A bright focal light source, such as a direct ophthalmoscope or ...

Refracts light as it enters the eye (by a fixed amount). Iris Coloured part of the eye that contains muscles. These relax or contract to adjust the size of the pupil. Controls how much light ...

Look at you. You're out of control. Ah, it's not you. I'm just talking about your reflexes-- those involuntary muscle movements that you have no control over. And reflexes are a great thing.

red-tinted light that gradually grows into a bright white light. This approach feels more natural and may be more effective at helping you feel less groggy when you wake up. The HF3520 has a good ...

White working class pupils have been failed by decades of neglect in England's education system, a report by MPs says. The Education Select Committee accused the government of a lack of targeted ...

The Basque fills the bill as a statement piece, but it also effectively highlights a favorite section of a room or provides bright light for reading, without being overwhelming. A lamp best suited ...