What is Colorimetry?
Colorimetry uses coloured optical filters to alleviate patient symptoms of visual discomfort, which often occur in both adults and children when reading. Examples of visual discomfort can be described as movement of print and visual rivers, which negatively affects concentration levels and comprehension. This is known as visual stress. The condition is estimated to be present in about 40 % of poor readers and in 20 % of the general population in varying degrees.
The following symptoms indicate you may be suffering from visual stress:
Tired when reading
Letters changing size or shape
Halos of colour surrounding letters of words
Red, sore, watery eyes
Blurring of print
Patterns on print
Tiring easily when reading
Precision Tinted Lenses
Precision Tinted Lens prescribed from the Colorimeter are reproduced precisely from specially dedicated laboratories. The core lens material used in the process is the safe CR39 plastic (allyl diglycol carbonate). The Precision Tinted Lenses are dyed to a degree of accuracy not found in ophthalmic tinting.
They are scanned using a calibrated spectrophotometer linked to a Medical Research Council software programme ensuring accuracy of the prescribed colour. Any requirement for refractive prescription can be incorporated in the tinted lenses. Each pair of prescribed Precision Tinted Lenses has an accompanying Certificate of Authenticity.
Find Your Solution
Acknowledged world-wide as the defining colour system that can provide one hundred thousand colour combinations.
The Intuitive Colorimeter is used extensively by vision professionals in the UK and throughout the world. Under the direction of our Optometrist, we guide patients in selecting an ophthalmic tint that reduces discomfort and perceptual distortion. An examination with the Colorimeter lasts about 20 minutes and enables the effects of hue, saturation and brightness to be explored systematically and efficiently whilst the eyes remain colour adapted. With the help of proprietary software, tinted trial lenses are then combined to assess the clinical benefits of the chosen colour under conventional lighting.
The shades available enable the tint to be precisely tailored to an individual’s needs. The prescribed tint is reproduced precisely in specially designed laboratories.
The system also allows for alternative colour combinations for use under different lighting conditions and includes UV and Blue Light transmissions. It also takes account of the effects of colour on traffic signals.
An essential aid for vision professionals as the first step in identifying Visual Stress.
Coloured Overlays are used widely both in the classroom and by vision professionals in practice. Moderate to significant improvements in both reading rate and accuracy are not uncommon when the optimum overlay is prescribed. Overlays are coloured sheets of robust transparent plastic that are placed over a page of text when reading. The assessment pack consists of 12 overlays of different colours. The colours have shades that differ systematically. The variety of shades is sufficient to provide a shade optimal for each individual. Assessment involves the presentation of each overlay in turn for comparison with others placed beside it. The assessment can be carried out by our specialised vision professional.
The Overlay Testing Set includes the Wilkins Rate of Reading Test, which measures reading speed independently of language comprehension. It quantifies the improvement in reading.
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