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There are some proposed ideas, one being that after the sphincter muscle is fully formed and developed in the eye there is a severing of the pupillary margins leading to the distinction of the extra pupil and the principal pupil. [6] Polycoria can also be caused any hole in one's iris to develop a sphincter muscle development. [6]
To see it, one must be in a dark room, with one eye closed; one must look straight ahead while moving a light back and forth in the field of the open eye. Then one should see the sixth Purkinje as a dimmer image moving in the opposite direction. The Purkinje tree is an image of the retinal blood vessels in one's own eye, first described by ...
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The person then closes one eye, and then the other. The person should notice that the target appears larger to the eye that it is directly in front of. When this object is viewed with both eyes, it is seen with a small amount of aniseikonia. The principles behind this demonstration are relative distance magnification (closer objects appear ...
As most cat owners surely know by now, receiving a slow blink from your cat is a great honor; in cat terms, shutting your eyes for any length of times means that you're feeling comfortable in that ...
prefix: aniso-from the Greek language (meaning: unequal), which in turn comes from an: meaning not and iso: meaning equal; the root word: cor, from the Greek word "korē" meaning: pupil of the eye-ia, which is a Latin suffix meaning: disease; pathological or abnormal condition; Thus, anisocoria means the condition of unequal pupil(s).
A coloboma (from the Greek κολόβωμα, meaning "defect") [1] is a hole in one of the structures of the eye, such as the iris, retina, choroid, or optic disc.The hole is present from birth and can be caused when a gap called the choroid fissure, which is present during early stages of prenatal development, fails to close up completely before a child is born.
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