| A | B |
|---|
| AID | Accident Incident Database produced by the FAA. |
| Blind Spot | The small circular area in the retina where the optic nerve enters the eye that is devoid of rods and cones and is insensitive to light. |
| Cone | Any of the conical photosensitive receptor cells of the vertebrate retina that functions in color vision. |
| Depth Perception | The ability to judge the distance of objects and the spatial relationship of objects at different distances. |
| Hypoxia | Occurs when the tissues in the body do not receive enough oxygen. |
| NTSB | National Transportation Safety Board. |
| Photopic Vision | Use of color-sensitive cones for direct vision in good light. |
| Pupil | The opening in the iris, which admits light into the interior of the vertebrate eye; muscles in the iris regulate its size. |
| Retina | The sensory membrane that lines most of the large posterior chamber of the vertebrate eye; composed of several layers including one containing the rods and cones; functions as the immediate instrument of vision by receiving the image formed by the lens and converting it into chemical and nervous signals which reach the brain by way of the optic nerve. |
| Rod | Any of the long rod-shaped photosensitive receptors in the retina that are responsive to faint light. |
