The difference in available light from the larger exit pupil is significant. The larger the exit pupil, the less critical the position of your head in relation to the scope is, also. The distance that your eye must be to the ocular lens to get a full, clear picture is called eye relief.
Symptoms of Selective IgA Deficiency. People with selective IgA deficiency are at risk of infections. About half of the patients with selective IgA deficiency who come to medical attention have repeated infections of the ears, sinuses, and bronchi (airways of the lungs), and pneumonia.
IgA Deficiency. Print. IgA deficiency is a defect in the immune system characterized by an inadequate amount of the antibody class known as immunoglobulin A (IgA). Antibodies are large proteins produced by the body to fight infections caused by invaders, such as bacteria, viruses, fungi, parasites, and other foreign agents.