Perimeter Smith Type

Specifications

Material : Stainless Steel
Color : Black

Product Description

The perimeter is an instrument for accurate charting of the field of vision. It consists of.
A vertical stand on which a metallic arc is pivoted.
It also bear a circular black disc to read the meridian in which the arc in shape of a semicircle with radius 330 mm.
Its rotating in any direction and fix at any position with a tightening screw.
The arc is graduated from 0 to 90 with a movable test object which is a white color spot of size 10mm diameter painted on a circular disc it can be moved with arc.
An adjustable chin rest and a detachable leveling bar is fixed in front of the metallic arc.
A scale and circular chart frame to hold the chart paper in position is provided at the back of the circular disc.
A metallic graduated scale with a movable pin-punch pointer is fixed to mark on the perimeter chart paper.