VISION TESTING EQUIPMENT CATALOGUE
Charts | Kits | Tests | Assemblies
To order products from the NVRI please go to our order page.
All prices include GST, but not postage, which is calculated when your order is received.
Direct enquiries for purchases to:
Administration and Enquiries
Email: nvri@aco.org.au
Phone: +61 3 9349 7524
LOGMAR CHARTS
LogMAR distance acuity charts - $121.00
Based on the original 6 metre distance acuity chart designed by Ian Bailey and Jan Lovie-Kitchin.
Bailey, IL and JE Lovie. "The design and use of a new near-vision chart". Am J Opt Physiol Optics (1980)57:378-387
The charts measure 1020 x 760 mm and feature 14 rows of LogMAR letters ranging from 6/60 (1.0 LogMAR) to 6/3 (-0.3 LogMAR).
The charts are available printed on stiff white board for external illumination.
LogMAR numbers chart - $110.00
This features numbers in the LogMAR format, instead of letters. The chart is printed on the back of the normal letter LogMAR chart on a 1020 x 760 mm stiff white board
Three-metre LogMAR chart - $121.00
This chart is designed for use at a distance of three metres.
It consists of LogMAR letters (14 rows) printed on 510 x 510 mm stiff white board and comes framed in frosted aluminium. It is available with visual acuity specified using a 3 metre test distance (3/30-3/1.5) and with the conventional Snellen fraction notations (6/60-6/3).
Three-metre low contrast LogMAR chart $135.00
This is a chart for use at 3 metres and features LogMAR letters in low contrast (10%). The charts are printed on 510 x 510 mm stiff white board and come framed.
Paediatric chart $121.00
This 6-metre chart (510 x 510 mm) uses symmetrical LogMAR letters (3/30 to 3/1.5) and comes with a laminated key card which is used by the subject to make a non-verbal response. This chart is framed in frosted aluminium.
Mini paediatric chart - $110.00
An ideal briefcase-sized chart which has been developed for use on domestic visits.
It measures 400x200mm and comes with a pointer card measuring 170x170mm and is constructed using a durable plastic.
Illiterate E chart $35.00
The Illiterate or Tumbling E chart, measuring 630 x 275 mm, is available printed on stiff white board, unframed.
Hi-Lo contrast LogMAR chart $121.00
This chart presents a side by side view of 2 LogMAR letter series (3/19 - 3/3.8). One is of normal contrast and the other of 10% contrast. It can be used reliably in low vision testing by reducing the test distance. The chart comes mounted in a frame for extra durability.
KITS
Rapid vision testing kit - $121.00
This economical kit is ideal for the General Practitioner. It can be used in the consulting room or in various external situations to provide a rapid assessment of visual performance. It consists of:
- LogMAR Distance chart, 6/24 to 6/3 letters
- LogMAR word reading card
- Amsler chart
- Guidelines for the use of the charts
All charts are laminated and are supplied in a sturdy vinyl pouch.
TESTS
Melbourne Edge Test - $198.00
The Melbourne Edge Test (MET) was originally designed by Jos Verbaken to permit fast and reliable assessment of the peak of the Contrast Sensitivity Function. The chart consists of a single luminance profile in four different orientations: horizontal, vertical, 45° left, and 45° right.
The MET is a non-grating contrast sensitivity chart. This test measures the contrast threshold for a single luminance profile edge, which is an aperiodic stimulus. There is psychophysical evidence that the edge contrast threshold is determined by the most sensitive spatial frequency channel, the higher threshold for a single edge with respect to the better performance for optimum spatial frequency gratings being due to probability summation. Forced choice methods of threshold determination have been shown to provide a more reliable measurement than the method of adjustment and other methods in which the patient's response criterion is not controlled. In this test the edge is presented at four different, randomly sequenced orientations. As orientation selectivity is a post-retinal function, orientation losses are diagnostic for optic nerve and visual cortex dysfunction. If an orientation defect is suspected it can easily be confirmed by presenting the chart in both normal horizontal format and by rotation in a vertical format.
Johnston LogMAR visual acuity calculator - $15.00
This ingenious sliding card is used for calculating acuity when using LogMAR charts at any distance. It comes with instructions and a review article by Associate Professor Alan Johnston on the clinical advantages of using LogMAR charts.
Magnification chart - $55.00
This comprises a set of 8 newspaper style text passages of different font sizes, ranging from 5 to 96 points. It is particularly useful for rapid assessment of the magnification needs of the low vision patient.
The chart is an A3 card laminated in a matte finish, folded in the middle. Fully opened, the chart measures 420 x 297 mm.
LogMAR word reading cards - $88.00
The reading cards are for use at a distance of 250 mm. They were designed by Ian Bailey and Jan Lovie at the NVRI and are based on the same principle as the distance charts. They contain 17 rows, each with up to six unconnected words of 4, 7 and 10 letters.
Bailey, IL and JE Lovie. "The design and use of a new near-vision chart". Am J Opt Physiol Optics (1980)57:378-387
Four different word sets, printed on white card (205 x 260 mm), are supplied.
The cards came laminated.
Amsler chart - $33.00
This simple, robust and economical chart, printed on plastifoam board is ideal for monitoring macular performance in the consulting room or at home.
ASSEMBLIES
NVRI Portable internally illuminated viewer - $440.00
The lightweight viewer is constructed from sturdy aluminium and weighs about 2Kg. It measures 38 x 51 x15 cm and has a carrying handle at the top.
Three easily interchangeable film plates, with the following commonly used charts are provided.
- Film 1 contains a selection of LogMAR letters sized 6/60 to 6/3, a duochrome test and a crossed cylinder target.
- Film 2 is a complete LogMAR chart, ranging from 6/24 to 6/1.5.
- Film 3 presents the illiterate E chart in LogMAR format, with letter sizes of 6/19 to 6/2.4.
4-sided rotating chart - $440.00
This LogMAR version of the traditional 4-sided rotating chart provides a compact (750 x 220 x 220 mm) set of charts for the consulting room. Features include:-
- 2 sets of 6/48 to 6/19 letters
- 1 children's set of 6/48 to 6/19 (using the Stycar reversible letters)
- fan, locater and fixation disparity
- sets of 6/15 to 6/3 letters with removable polaroid and red/green filters
- set of 6/15 to 6/3 low contrast (10%) letters and fixation spot
The top half or bottom half of the panels can be illuminated separately using the remote switching box.
