Page 27 - 2025 Bernell Catalog

measurement devices
EXAM ROOM NEEDS
PockEt cff tEstERTM CSCFF $449.95
The critical flicker frequency testing device is a compact, hand-held device for determining the CFF values of a patient’s vision. Critical fusion frequency is the point at which a light is
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ASSESSMENTS
The CFF unit will give you three values:
1) The point where the solid light first starts to flicker is referred to as non-seeing to seeing or NSTS. 2) The point where you are seeing the flicker and the frequency increases till you no longer
see the flicker, which is referred to as seeing to non-seeing or STNS. 3) The average of the two values above.
Placido disk, cliP, & haNdlE This economical keratoscope is used to determine the curvature
characteristics of the anterior surface of the cornea.
Backside of card with lens clip
White vinyl washable.
BC2171 $47.95
Round cornered 10.5” x 11” disc with two sided print.
Includes: Handle and trial lens holder.
accommodatioN & NEaR PoiNt RulE
Dark Grey
The near point rule is the point closest to the bridge of the nose where convergence and binocular single vision can no longer be maintained as an object approaches.
GR50B $84.95
Made of gray opaque plastic with white markings.
The Accommodation and Near Point Rule measures 50 cm long, 10 mm square, it is engraved with Centimeters, Inches, Diopter Scales and Duane Age (the mean of the near point of accommodation at different ages according to
Duane Age) with sliding cardholder.
OPTICAL
Kit Includes:
• Accommodation Convergence Rule • Two Cards printed on Styrene
• Slide Card Holder
Front Back
VISION THERAPY
accommodatioN coNVERgENcE RulE
Used to test & train monocular, binocular, accommodation, and rock. Trains convergence using physiological diplopia as the control on suppression. Features four scales; dioptric values, duane age, centimeters and inches. Made of durable plastic with engraved black numbers.
GR50 (Complete Kit) GR50CH (Cardholder Only) BC21 (Replacement Card)
$84.95 $21.95 $2.50
Size: 21” long x 7/16” square
NEURO REHABILITATION
ExoPhthalmomEtER
Made of clear plastic, exophthalmometer has millimeter scale on both sides to check for parallax. Luedde design.
3-1/4” long. Fits in coat/shirt pocket.
WO05655 $41.95
LOW VISION
REFERENCE
Kit Includes: Accommodation convergence rule, slide card holder and two cards.
flickering so fast that the visual system perceives it as a solid or non-flickering light.
In certain neurological conditions, the CFF of a patient will change. The measurements may be taken on the right eye, left eye or both eyes.
Scan QR code to view an animation of the flickering light.