iDili Portable Maddox Rod Phoria Tester - Optical Strabismus Testing Kit with 20 Prism Diopters & Rotating Scale | Near/Far Ocular Alignment Tool

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 (1–³/increment) and can be adjusted during testing. | Inspection range 20–³ | Multiple uses: Introphoria inspection/exophoria inspection/superophoria inspection