False regarding a patient of color blindness is: (LQ)
|A||More common in males|
|B||Most common anomaly is blue green defect|
|C||There is normal visual acuity|
|D||Misnomer as it is actually a color defect and not blindness|
1. Congenital color blindness or achromatopsia occur in two forms; total and partial.
2. Total form is very rare and is associated with nystagmus and central scotoma.
3. All colors appear grey with different brightness.
4. Gross cases occurs in 3-4% of males Qbut is rare in females.
5. Slighter cases are more common in males. In most cases red and green Q colors are confused.
6. It can be tested by Ishihara chart.