The diuretics are generally divided into four major classes, which are distinguished by the site at which they impair sodium reabsorption [1,2]: âLoop diuretics act in the thick ascending limb of the loop of Henle.
Night blindness, also known as nyctalopia, is the inability to see clearly at night or in dim light (such as raining or dark room). Nyctalopia is not an eye disease or disorder. It is actually a symptom or indication of an underlying problem in which some may be serious.
Causes of Night Blindness / Nyctalopia. Night blindness, also called âNyctalopiaâ, is a condition characterized by the inability to see well or to see at all in low light. It can also give a diminished ability to see contrast and difficulty transitioning from bright light to dim light.ommon causes of untreatable night blindness include the following conditions. 1  X-linked congenital stationary night blindness â This type of night blindness is, as the name says, congenital. 2  It is caused by a genetic defect and comes in two forms: complete and incomplete.