Tritanopia

Tritanopia is an extremely rare form of colour blindness characterised by a selective deficiency of blue vision.

Deuteranopia

Complete lack of the M photopigment, which is replaced with the L photopigment. Affected individuals tend to confuse red and green.


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PMID (PMCID)
7067594
 MIXED_SAMPLE Infant
X-recessive angiopathic opticopathy.
Bastiaensen LA, Vandoninck JJ.
Doc Ophthalmol. 1982;52(3-4):227-39.
The symptoms are: slight to moderate pallor of the papillomacular bundle at the disc possibly preceded by some hyperaemia of the disc, telangiectasia on the disc with normal retinal vessels, occurrence in the second decade of life, slow progression with often subclinical visual loss, a small relative central scotoma with an intact peripheral visual field, slight acquired tritanopia and deuteranopia, and vasomotor headaches.