scot-, scoto-, skot-, skoto- +
(Greek: darkness; blindness)
2. The very fine, linear field defects produced by the retinal blood vessels.
3. A cecocentral scotoma caused by shadows of the retinal blood vessels.
2. A blind spot or defect in the visual field produced by dilated retinal vessels that is especially prevalent in persons long exposed to high altitudes
2. The plotting or mapping of the scotoma caused by the shadow of retinal blood vessels; used particularly in the diagnosis of glaucoma.
2. The study of light pollution at night as it directly impacts biological existence which is usually specifically affected by darkness.
Plants and animals are programmed to function in a certain pattern of daylight and darkness. Alter those patterns and unhealthy things often happen.
It applies equally to organisms that are active at night and those, including humans, whose bodies require regular periods with the lights out.
Some people believe that as with all types of pollution, light pollution contaminates the natural environment and produces side effects that should be mitigated or avoided, if possible, to create a balance between necessary urban light levels and a healthy environment.
2. Any microorganism that produces pigment when grown without light as well as with light.
2. Dizziness and headache associated with the appearance of black spots before the eyes.
2. An instrument for writing in the dark, or when unable to see.
2. An appliance for aiding one to write in straight lines in the dark or for aiding the blind to write, as used by the historian W.H. Prescott.
2. Loss of vision in a part of the visual field; a blind spot.
3. A permanent or temporary area of diminished sight in the field of vision.