We are all familiar with visual acuity. This measures a visual threshold by keeping the contrast of an object high and constant, whilst varying the spatial separation. An alternative method to measure a visual threshold is to use a contrast sensitivity test, which varies contrast than spatial separation.
The visual acuity of a patient may be normal, but there may be a lowered contrast sensitivity function at low and intermediate spatial frequencies.
303mm x 185mm The card is laminated and non-reflective card for surface protection.
The text used is interesting and in a modern prose form. It is not designed to test reading skill but rather to present an easy and neutral clinical test in accordance with the recommendation of the Faculty of Ophthalmologists, London. The isolated test words will suit a wide range of patients with different reading abilities – including children.
303mm x 185mm The card is laminated and non-reflective card for surface protection.
The text used is interesting and in a modern prose form. It is not designed to test reading skill but rather to present an easy and neutral clinical test in accordance with the recommendation of the Faculty of Ophthalmologists, London. The isolated test words will suit a wide range of patients with different reading abilities – including children.
A take-home ARMD Test– AMSLER chart for testing and monitoring macular problems. The practitioner takes a page off the pad and gives it to the patient to take away for monitoring at home
Printed on pad leaf.
Area on pad leaf for the Practice Stamp, date and the name of the practitioner.
Pad size: A5 (210 x 148 mm)
Pages: 50 per pad
Paper: Good quality light card paper to which a “fridge” magnet could be affixed to.
The New Davis Chart
Approved test type chart for Vision and Hearing Technicians (VHT)
Approved by Ministry of Health and RANSCO
Easy to clean*
String holes to hang on a wall
Non-reflective letters and card
Laminated and double-sided to reduce memorising
Goes with the VHT handheld occlude (EYMOB)
The Veale-AllBlax LogMAR reading card is to be used at 35cm (14 inches) from the eyes.
This reading card is designed with LogMAR letter sizing starting at 1.6 through to 0.0 in 0.1 steps. There are 16 lines in total with Snellen Notation equivalent point size numbers alongside each LogMAR number for easy referencing.
The OPTICA Eye Health Kit contains 8 different eye tests, perfect for new practice room set ups.
This kit includes:
Standard Snellen notation for acuity test used by optometrists, ophthalmologists, medical doctors and occupation health personnel for sights tests including aviation, marine, police and defence certification.
Black Hand Held Flat Occluder
Overall length: 197 mm
Occluder diameter: 57 mm
Durable and easy to clean.
Black Hand Held Pin-Hole Occluder
Overall length: 245 mm
Occluder diameter: 57 mm
Holes: 0.9mm spoke hub array at 30º
Durable and easy to clean.
Black Hand Held Spoon Occluder
Overall length: 245 mm
Occluder diameter: 57 mm
Durable and easy to clean.
Large glasses frames, suitable from approximately age 8 to adult with one occluded lens for vision testing. Set of two pairs, navy and brown colour. They measure 14.5cm across the inside of the frame.
These individual square loose prisms are each approximately 38mm square in size.
The advantage of press-on prisms:
Practical, lightweight, wide power range. Thin and flexible and easy to fix to existing lenses – held by static adhesion, easily removed. Low cost and low risk treatment during power changes and vision therapy.