TABLE 5.
Additional list of symbols and definitions pertaining to the third biophysical function
| Symbol | Definition |
| ƒ | Absorption efficiency factor due to oblique incidence (Eq. 31) |
| Ai | Collection area (circular); largest cross section of inner segment |
| di | Diameter of Ai |
| Φi | Total flux at entrance aperture of an inner segment |
| Ji | Flux density at entrance aperture of an inner segment |
| Jaz | Rate of flux density absorption |
| FC | Concentration factor (Eq. 33) |
| FG | Geometry factor (Eq. 35) |
| dt | Diameter at the tip of a frustum |
| h | Altitude or height of a cone or cylinder |
| Vr | Volume of a rod outer segment |
| Vc | Volume of a cone outer segment |
| Vreq | Volume of an optically equivalent rod outer segment |
| VR | Volume reduction ratio as defined by Eq. 36 |