Good-Lite Pocket Neutral Density Bar

by: Good Lite
Sold out


SKU GLT00576

For bulk pricing, use either the slider or the quantity below.


Enter the quantity you'd like, or click and drag the slider to find a quantity and price that's right for you.

Item is out of stock


Please note: Item is out of stock. Estimated dispatch 20 days from date of order.

Pocket Neutral Density Bar

Used to measure Afferent Pupillary Defects (APD) which is defined as diminished pupil reaction to light levels. It uses 6 standard ND levels for quantifying APD. The log units quantify amount of light transmitted through the filter. Includes 6 filters rated as 0.3 0.6 0.9 1.2 1.5 and 1.8 log unit optical density values. The 0.3 ND filter is most useful for uncovering a borderline pupil defect.