Portable Maddox Rod Phoria Tester - Optical Strabismus Testing Kit with 20 Prism For Sale

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Portable Maddox Rod Phoria Tester - Optical Strabismus Testing Kit with 20 Prism Diopters & Rotating Scale | Near/Far Ocular Alignment ToolDescription Part Number I-3-302 Batteries Required? No Power Source Battery Powered Item Package Quantity 1 Item Weight 12.3 ounces Batteries Included? No Measurement Accuracy 1 Package Dimensions 9.75 x 5.85 x 3.93 inches Included Components other

• Diagnose latent strabismus with an accuracy of 1° using the 20-prism diopter range. The large viewing aperture ensures clear red line projection for both near (33 cm) and far (3-5 m) testing, making it far more portable than traditional prism rods.
• Laser marking, durable.
• Portable phoria tester, which can measure near and far eye position.The rotary dial has a tactile click (1△/increment) and can be adjusted during testing.
• Inspection range 20△
• Multiple uses: Introphoria inspection/exophoria inspection/superophoria inspection

Product description Description:

• Portable cryptic tester can measure the position of the near and far eyes
• 20 prisms, large viewing hole
• Inspection range: 0△~20△ (△ is the degree of the three-calibration mirror) each division value is 1△.

Operation method:

• Hold the handle 1 of the instrument, align the index mark on the rotating prism 2 with the \"0\" mark on the reading ring 3 (hereinafter referred to as zeroing), and then look at the light source of the bulb 3~5 meters away in front with both eyes at the same time (an ordinary flashlight can be used as a light source).
• Then one eye leans on the end face of the Maddox rod frame 4, observes the point light source through the instrument, and the other eye directly observes the point light source. At this time, one eye sees a bright red light line, and the other eye sees a light spot of the light source.
• If the light does not pass through the light spot, there is a prism in both eyes. At this time, turn the small hand wheel 5 until the bright red light passes through the light spot, and then read the number on the reading ring. The value read is the degree of the prism of the prism to be checked.
• After zeroing, place the instrument in front of the left (right) eye with the Maddox rod fringe slot placed vertically. At this time, the left (right) eye sees a horizontal red bright line, and the right (left) eye sees a light spot of the light source. If the light spot is above (below) the red bright line, it is left eye hypertropia; otherwise, it is right eye hypertropia (see Figure 2).
• Turn the small hand wheel 5 until the red bright line passes through the light spot of the light source. Then read the reading on the reading ring.

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