VISUAL FIELD use perimeter

2. VISUAL FIELD use perimeter

The equipment for visual field test is perimeter. Place the perimeter on the laboratory table Ask the subject sitting face to the perimeter, and close one eye which is note test. If the right eye would be tested, close the feft eye and visepersa. Palace the subject chic on the chic support and ajust the height so the lower margin of their eye and the eye level equal to the center of perimeter. Fit he perimeter fist so the perimeter arc on the plane surface Ask the subject to focus their sight to the centre of perimeter during the examination. Take the sign tool white and move it along the perimeter arc from side to the center , and stop when the subject begin sea it, and read the number at the perimeter arc, and than write on the form. Repeated again that method after move the perimeter arc 30 degree clock wise direction Do it to the other eye with the same method. Learning task: comprehend the difference of visual field of right and left eye. What is the mono and binocular vision?. 3. PUPIL REFLEX, CONSENSUIL REFLEX and PUPIL REFLEX DURING ACCOMMODATION use flashlight Ask the subject sitting on the chair and relax Beam of light to the right eye of the subject with flashlight, and look at the change of pupil diameter of the right eye if the pupil diameter is smaller, it mean pupil reflex positive. Repeat it again but now look the change of pupil diameter of the left eye consensual reflex, If the diameter of left eye is smaller, it mean consensual reflex positive Ask the subject to watch the examiner’s fingers from distance around 50 cm and than moving it approach the subject focusing the eyes or accommodation, and the examiner watching the changes of pupil diameter .During accommodation the pupil diameter should be smaller. Learning task: describe the mechanism of pupil reflex and consensual reflex. Why the pupil diameter change to smaller during accommodation?

4. ORGANIC AND FUNCTIONAL COLOR BLINDNESS use Ishihara chart and wall thread.