Ishihara Colour Vision Test defects. Patients must identify numbers or patterns formed in a matrix of small coloured dots varying in colour & intensity (pseudo-isochromatic plates). Ideal for commercial/industrial colour screening. Two editions available: 38 plate (for detailed investigation). 24 plate (for quick screening).
Each instrument is supplied with a polarised visor for the patient when viewing the complimentary 90/180 polarised screen. Also provided, is a patient image analysis card for the interpretation of the results. The D.F.D.U. may be viewed directly at 6m or indirectly via a mirror
finished in an attractive and durable grey powder coating and the front opens for easy access to the lamps and for cleaning. This product is available in direct or reverse format - please state which is required when ordering
the presence of macular suppression. Low power LEDs are utilized for illumination and the power supply is 12V DC via a mains adaptor (supplied). The face of the test light embodies complimentary red/green filters and this test can be used with red/green goggles or stereo
The test contains a reference disc holding notation 10B54 and 15 numbered discs which make up an incomplete colour circle. The patient arranges the discs and then evaluation of the patient's arrangement separates "normal" colour perception from moderate and strong defects
This smaller LogMar cabinet has been designed to provide even illumination essential to contrast sensitivity testing. This cabinet uses 3m charts and all of these can be found under "LogMar Charts". There is generous storage at the back of the unit for alternative charts
Superior streak quality enables easier and quicker refractions – even in patients with small pupils
The crossed linear polarising filter eliminates bothersome glare from trial lenses, helping you to perform a more precise exam
doubles as a stand and/or wall bracket. Can be supplied with TVH Snellen (6/60 to 6/5) and Kindergarten panels, TVH Snellen (6/60 to 6/5) and OAX Snellen (6/60 to 6/6) panels or TVH Snellen (6/60 to 6/5) and 594 Snellen Numerical Chart (6/60 to 6/5).