Key Words: Colour Vision Deficiency (CVD), frequency, shade selection, restorative dentist.
Sample size calculated was 240 using colour vision deficiency percentage of 4.
Age wise frequency distribution of colour vision deficiency.
Colour recognition in some jobs like doctors, educational trainers and drivers is essential and hence detection of colour vision deficiency at an early age can be useful to avoid certain occupational hazards.
03 What percentage of the general population is likely to suffer from the congenital colour vision deficiency
illustrated in Image A?
Exclusion Criteria: (i) Diabetic patients with visual acuity 6/36 or lesser as the Ishihara interpretation may not be accurate; (ii) Known cases of colour vision deficiency, Central serous retinopathy, optic neuritis; (iii) Patients on Anti Tubercular therapy; (iv) Chronic uveitis, glaucoma; (v) Family history of colour vision disorders; (vi) History of any vitreoretinal surgeries in the past; (vii) Presence of cataract.
Out of the 100 diabetic patients examined, 46 were found to have colour vision deficiency.
This observational study was done on 92 patients with diabetes mellitus having colour vision deficiency attending outpatient department of ESIC Medical College and PGIMSR Bangalore over one year and five months between April 2012 and September 2013.
Inclusion Criteria: (i) All patients with diabetes mellitus with visual acuity of 6/24 or better; (ii) Presence of at least mild diabetic retinopathy; (iii) Presence of tritan, deuteran, or total colour vision deficiency.
The colour vision deficiency
therefore had a more noticeable effect on the lives of dichromats than anomalous trichromats.
It was recognised in the 17th Century that colour vision deficiency
could occur as a result of illness or any treatment received for it.
The practitioner should consider the patient's family history of colour vision deficiency
, especially if a deficiency occurs on the mother's side (mother's father or brother).
5% of women of European descent have an inherited colour vision deficiency
Around 8% of men and less than 1% of women have some form of colour vision deficiency
The most common colour vision deficiency
in Europe is the partial-green deficiency known as "deuteranomaly", which is found in approximately 6% of the male population.