Optical instrument Eyes and glasses

EYE Eyes are optical devices that have a way of working as a camera. 1. Eyes is Optic Instrument Consisting of: cornea, pupil, iris, crystalline lens, aqueous humor, vitreous humor, retina and muscle siliar.

PUPIL IRIS RETINA LENS OF LENS OF EYE AQUEOUS HUMOR VITREUS HUMOR CORNEA MUSCLE SILIAR

CORNEA Cornea is the membranes (lining) outside of the eyeball that is not colored (clear). As a protective eye parts in it. Recipients of light stimulation and forwarded to the deeper part of the eye. FUNCTION : Kembali

PUPIL Pupil is circular space in the middle of the iris FUNCTION: As the passage of light entering into the retina Kembali

IRIS Iris is a layer in front of the lens of the eye in color, the color is what determines the color of someone's eyes FUNCTION : Adjust the width of the pupil so that the amount of light entering the eye can be controlled Adjust the width of the pupil so that the amount of light entering the eye can be controlled Kembali

AQUEOUS HUMOUR Is contained in the fluid between the cornea and lens of the eye. FUNGSINYA: To give shape and solidity of the eye. Kembali

LENS OF EYES FUNCTION : Untuk memfokuskan cahaya atau bayangan benda agar tepat jatuh di retina Untuk memfokuskan cahaya atau bayangan benda agar tepat jatuh di retina Kembali Eye lens is transparent objects in the ball-shaped eyes convex, situated just behind the iris

VITREOUS HUMOUR Fluid is contained between the lens and retina of the eye FUNCTION: To give shape and solidity of the eye. Kembali

RETINA Is the innermost layer of the eyeball wall FUNCTION : As a recipient of the display of light or shadow objects, shadows are received by the retina is inverted and reduced real Kembali

MUSCLE SILIAR So that the shadow always falls exactly on the retina, lens focal length should be at the changes FUNCTION : Set the focal length (curvature) lens. Kembali

If a subject is beyond the limits of vision of normal eyes, said eye disorder or eye defects 2. EYE DEFECT Normal eye is the eye with a boundary near vision point or punctum proximum (PP) 25 cm and distant point or punctum remotum (PR) is not unlimited.

Nearsighted patients, can see clearly distance object 25 cm (sn = 25 cm) but can not see clearly far distance object. 1. MYOPIA Myopia can be cured by using concave eyeglasses. THE TYPES OF EYES DEFECT

SKEMA MATA MIOPI A. BEFORE USING GLASSES B. AFTER USING GLASSES FAR OBJECT POINT FAR POINTS (PR) S1S1

2. (HIPERMETROPI) Hypermetropia can be cured by using convex eyeglasses. Farsighted suffer can see clearly far object, but can not see clearly distance 25 cm

SKEMA HIPERMETROPI OF EYES A. BEFORE USING GLASSES B. AFTER USING GLASSES NEAR OBJECT POINT FAR POINT(PR) S 1 = S n 25 cm

3. PRESBIOPI Presbiopy suffer can be cured by using bifokal eyeglasses Presbiopy suffer can not see clearly far distance object and near distance object to (normal distance)

PRESBIOPI EYE S S’(-) A. Before using eyeglasses B. After using eyeglasses

4. Astigmatisma Penderita Astigmtisma dapat di tolong dengan kaca mata berlensa silindris Penderita Astigmatisma akibat dari kornea mata yang tidak berbentuk sferik, melainkan lebih melengkung pada satu bidang dari pada yang lainnya.

Without eyeglasses Using eyeglasses silinder