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Worksheet – The Eye Name: ________________________ Match the name to its description/function A. B. C. D. E. F. G. H. I. aqueous humor cataract chalazion choroid ciliary gland cones conjunctiva cornea fovea centralis _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ J. K. L. M. N. iris lacrimal fluid lacrimal gland lens meibomian or tarsal gland O. nasolacrimal duct P. optic disk Q. optic nerve R. palpebra S. pupil T. retina U. rods V. sclera W. sty X. suspensory ligaments Y. vitreous humor "white" of eye - tough outer coat that extends all around eye “blind spot” – where optic nerve leaves the eyeball blood rich middle layer that is darkly pigmented to prevent light scattering carries sight impulses to brain contains ciliary body muscles that adjust shape of lens as necessary to focus contains only cones – site of greatest visual acuity dilute salt solution that contains antibodies & lysozyme eyelids focuses light on retina for visual clarity Gel like substance that holds shape of eyeball – located between lens & retina Clouding & hardening of the lens – can be treated surgically inflammation of the ciliary gland inflammation of the tarsal gland innermost layer that contains photoreceptors - "screen" of eye produces oil to lubricate eye opening through which light passes to enter the inner part of eye Pigmented muscle fibers that regulates light entering eye produces sweat (watery fluid) produces tears to wash surface of eye responsible for color vision responsible for gray tone vision thin moist membrane that lines eyelids & connects to surface of eye transparent layer in front of lens - lets light in- often transplanted Watery fluid that provides nutrients for lens & cornea – located between lens & cornea Empties tears into nasal cavity Match the letters on the diagrams to the parts below _____ _____ _____ _____ _____ aqueous humor choroid ciliary body cornea fovea centralis Match the muscles to their function a. superior oblique b. inferior oblique c. lateral rectus _____ _____ _____ _____ _____ iris lens optic disc optic nerve pupil _____ retina _____ sclera _____ suspensory ligament _____ vitreous humor d. medial rectus e. superior rectus f. inferior rectus _____ moves eye laterally _____ Moves eye medially _____ Depresses eye and turns it laterally _____ Elevates eye and turns it laterally _____ Elevates eye _____ Depresses eye ___________________________________________________________________________ Match the eye muscles to the diagram _____ Superior oblique _____ Medial rectus _____ Inferior oblique _____ Superior rectus _____ Lateral rectus _____ Inferior rectus Eye. 1. List the refractory structures of the eye. 2. Which is the only structure that can change its refractory power? ________________ Vision 1. Presbyopia a. Define: b. Cause: 2. Define Emmetropia 3. Astigmatism a. Define: b. Cause: 4. Complete the chart Myopia One word definition Explain Hyperopia Eyeball is too: Lens is too: Cornea is too: Corrective lens 5. Why do you get a headache when you’ve been reading for a long time? 6. Know these disorders for quiz. o Chalazion o Conjunctivitis o Sty o Colorblindness 7. Complete the chart Structure relaxed Distance Vision Near Vision o Cataract o glaucoma Structure tightened Light refraction (Increase or decrease)
