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Properties of Light
- Human eye perceives light that is reflected or emitted from an object which is then translated from through the brain to form an image.
- The human eye can detect wavelengths from 400 nanometers (violet) to 750 nanometers (red). This wavelength is called the Visual Spectrum.
Measurement of Light
- Amplitude: Height of wave; brightness.
- Wavelength: Distance between waves: hue.
- Purity: Extent to which light is dominated by a single wavelength.
Sclera
- The white of the eye.
- Gives the eye shape and protection.
- Consists of dense fibrous material.
Cornea
- Front-most layer that covers the iris, pupil, and anterior chamber.
- Clear section of the sclera that allows light into the eye.
Aqueous Humour
- Transparent and gelatinous metabolic fluid.
- Removes waste.
Iris
- Thin circular structure responsible for controlling the diameter of the pupil.
- A membrane that controls amount of light received and is the color of an individual's eyes.
Pupil
- The opening between the membranes of the eye.
Lens
- The structure responsible for bending the received light and projecting it onto the retina.
- Images are inverted and must be curved to see close images.
Ciliary Muscles & Zonule Fibers
- Responsible for changing the shape of the lenses.
Vitreous Humour
- Clear yellow gelatinous fluid that fills the eye.
- Responsible for the keeping shape of the eye and protecting the retina from burning.
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