Web2 different curvatures in 2 meridians that are 90 degrees apart. Corrected: with cylindrically ground lenses, corneal implants. With the Rule Astigmatism Curvature greater in vertical meridian (90+-30) ( STEEPER ). Flattest in horizontal meridian (180+-30). Minus cylinder orientation x180 +/-30. Against-the-Rule Astigmatism WebGROSS ANATOMY OF THE EARThe ear which contains sensory receptor for hearing and equilibrium is a complex structure.It is divided into three major areas: the external ear, the middle ear and the internal ear.The external and middle ear structures serve the needs of the sense of hearing only, whereas internalear structures function both in …

Discuss physiological consequences that can occur as a result of...

WebTrace the pathway of light through the eye to the retina, Outline the causes/consequences of astigmatism, myopia, hyperopia & presbyopia.Describe the process of phototransduction and the conversion of light into AP’s. Compare and contrast the roles of rods and cones in vision & light and dark adaptation. Webcilliary muscles are completely relaxed in distance vision, which causes a pull on zonule. as a result, lenses are stretched flat close vision light from close objects diverges as it approaches eyes: requires eye to make active adjustments using 3 processes accomodation of lenses (shape, increase refraction) constriction of pupils shared apps file

Vision.docx - Vision One of the five special senses is...

WebThis refractory problem is astigmatism. To correct this problem, special cylindrically ground lenses, corneal implants, or laser procedures are used. Color blindness is related to a congenital lack of one or more of the cone types. Inherited as an X-linked condition, it is much more prevalent in men than in women. Webproduces a lubricating mucous secretion lines eyelids and covers sclera lacrimal apparatus makes and drains tears lacrimal gland above lateral end of eye secretes tears nasolacrimal duct drains tears into nasal cavity lacrimal (pic) extrinsic eye muscles six strap-like extrinsic eye muscles originate from bony orbit; insert on eyeball WebCiliary body • Ring of tissue surrounding the lens • Smooth myo bundles ( ciliary myo ) control lens shape (accommodation) • Capillaries of ciliary processes secrete humor • Ciliary zonule (suspensory ligament) holds lens in position Iris • The colored part of the eye Pupil (part of iris) shared apps on iphone