HY-18 Digital PD Ruler

Converts smart phones into professional digital eyepieces for the traditional optical Instruments. Just attach the equipped smart phone to the

Features Outstanding Optic Quality Ensure the Comfortable View Parallel type, Galilean system LED Illumination, long life time Haag-Streit type slit

Feature:  Non-mydriatic image with reliable quality.  45⁰ full-circle design.  Switching anterior-posterior, para-position compensation lens.  Split-line aligning

Feature: 1.automatic operation system 2. red-free filter 3.anterior eye photography 4.with computer built in 5.non-mydriatic，auto focus, auto exposure 6. with