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Pathway of Light

Eye - Pathway of Light

QuestionAnswer
For us to see, light waves must enter the WHAT and focus on the WHAT? Cornea (eye), retina
In addition to following an unimpeded path, light waves must WHAT to focus on the retina. Bend
The bending of light waves is called WHAT? Refraction
In addition to the cornea and aqueous humor being capable of refracting light, the WHAT can change its shape and its refracting power? Lens
The lens can change its shape and its refracting power, thereby enabling the eye to continuously adjust to BLANK and BLANK vision. Near and Far
The lens is an elastic structure held in place by the suspensory ligaments attached to the WHAT muscles? Ciliary
When the ciliary muscles contract and relax, the changes in tension cause a change in the shape of the WHAT? Lens
The change in shape of the lens affects how much the light is WHAT? Bent
If the lens becomes fatter, the light wave is bent at a WHAT angle? Sharper
The ability of the lens to change its shape to focus on a close object is called WHAT? Accommodation
This term refers to the ability of the eye to refract light without the assistance of a corrective WHAT? Lens
Once the light penetrates the various eye structures, it must stimulate the WHAT of the retina? Photoreceptors (rods/cones)
The rods are abundant in the periphery. In low light conditions the pupil dilates and allows light rays to scatter along periphery of retina, stimulating the WHAT? Rods
The image produced by the stimulation of rods is what colour? Black and white
Because rods respond to dim light, stimulation of rods is often called WHAT? Night vision
WHAT are the photoreceptors for colour vision? Cones
Cones are most abundant in the WHAT portion of the retina? Central portion
When environment is well lit, the pupil is constricted and directs the light toward the WHAT cone rich part of the retina? Central
The image produced by the stimulation of cones is BLANK and sharp. Coloured
There are 3 types of cones, each with a different visual WHAT? Pigment (light sensitive chemical) (blue, red, green)
Nerve impulses that arise from the photoreceptors leave the eye (retina) by way of the WHAT nerve (CNII)? Optic
Once the nerve impulses leave the eye by way of the optic nerve, they travel along the fibers of the optic BLANK and optic BLANK to the BLANK lobe of the brain. This pathway is called the visual pathway Nerves, tracts, occipital
Created by: JoJo500%
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