The connection between blue-yellow axis dyschromatopsia
preceding diabetic retinopathy was observed in recent studies [51-53].
All patients show reduced contrast sensitivity and dyschromatopsia
, which are often out of proportion to the visual acuity deficit.
Acquired central dyschromatopsia
: Analysis of a case with preservation of color discrimination.
The papillomacular bundle is affected first, and its apoptosis and axonal swelling are responsible for the central VF loss, as well as dyschromatopsia
The patient had suffered, to variable degrees, from painless blurred vision, dyschromatopsia
, and micropsia for more than 2 years.
Our results showed that diabetic patients without demonstrable retinopathy have an increased incidence of acquired dyschromatopsia
. In this study, impaired colour vision in group I NIDDM subjects were 30 out of 85.
The left eye also exhibited a large central scotoma, dyschromatopsia
, and a left afferent pupillary defect.
Patients may experience a variety of visual disturbances from asymptomatic to a sudden onset of blurred vision, micropsia, metamorphopsia, dyschromatopsia
, or paracentral scotoma .
(3) Patients may complain of blurring of central vision, dyschromatopsia
, metamorphopsia, micropsia.
In its congenital form, there is a complete absence of cone cell activity, a condition also referred to as 'rod monochromacy' or 'total colour blindness.' A less severe form of the disorder is called dyschromatopsia
, the most common symptom being 'hemeralopia' and as a result, achromatopsia frequently leads to photophobia.