Which of the following defects are usually acquired?

Tritanopia is a type of color vision deficiency characterized by a difficulty in distinguishing between blue and yellow hues. This condition is typically acquired through various factors, such as aging, ocular diseases, or certain systemic conditions that affect the ability of the retina or visual pathways to process color information effectively.

In contrast, other color vision defects such as protanopia and deuteranopia are generally inherited and linked to genetic mutations that affect the photopigments responsible for color detection in cone cells. Rod monochromacy, which results in the complete absence of cone photoreceptors leading to reliance solely on rod photoreceptors, is also primarily a hereditary condition.

The distinction between inherited and acquired color vision deficiencies is crucial for understanding the underlying mechanisms of visual perception and the implications for diagnosis and treatment in clinical practice. Recognizing that tritanopia can be acquired highlights the importance of monitoring eye health and addressing any conditions that may impact visual function as a person ages or experiences changes in health.