The CP-670 serves optometry practices and ophthalmology clinics that measure visual acuity and test binocular function at distances of 2.9 to 6.1 m. A library of 33 charts covers visual acuity, heterophoria, binocular vision and stereo vision tests, so one projector supports the whole refraction routine. A practice that wants a dependable, programmable chart projector for everyday acuity and binocular testing will find the chart range easy to use from the first appointment of the day to the last.
The acuity charts include letters, numbers, Snellen, Landolt and children's charts. An astigmatism clock dial supports astigmatism checks; red and green charts support binocular balance; and a Worth four-dot test, minute stereo, and Schober charts support binocular and stereo vision work.
A single letter mask, a vertical line mask and a horizontal line mask isolate part of a chart. Three programs, A, B and C, present charts in a programmed order from the wireless remote. Program A holds a standard set; programs B and C can be arranged by the user, and the memory is kept when the batteries are replaced. A routine set once returns at the press of a key, which keeps each consultation calm and consistent for every patient who sits in the chair.
The CP-670 can be synchronised with a Nidek RT unit, so the chart follows the refraction routine. A 6 V, 20 W halogen lamp has a rated life of 2,000 hours, and a test scale sheet helps set the projection distance during installation. Together, these features give an examiner a steady, repeatable way to present charts and masks in everyday refraction work.