Macular edema Macular edema Macular edema occurs when fluid and protein deposits collect on or under the macula of the eye (a yellow central area of the retina) and causes it to thicken and swell (edema). The swelling may distort a person's central vision, because the macula holds tightly packed cones that provide sharp, clear, central vision to enable a person to see detail, form, and color that is directly in the centre of the field of view. The causes of macular edema are numerous and different causes may be inter-related. Cystoid macular edema (CME) involves fluid accumulation in the outer plexiform
Dropsy (fish disease) at the very least the fish is very ill and requires immediate quarantine and treatment. Dropsy (fish disease) Dropsy is a disease in fish caused by the buildup of fluid inside the body cavity or tissues. As a symptom rather than a disease, it can indicate a number of underlying diseases, including bacterial infections, parasitic infections, or liver dysfunction. Because dropsy is a symptom of an illness, its cause may or may not be contagious. However, it is standard practice to quarantine sick fish to prevent spreading the underlying cause to the other fish in the tank community. By the