| Menelaus's work formed the basis for Ptolemy's numerical solutions of spherical astronomy problems in the Almagest. |
| To eliminate the residual aberration in the spherical lens, we need to increase the refractive index of the glass. |
| A single very small spherical shell is characterized by a lumpy to ragged surface and numerous short spines. |
| Typical aberrations that can impact imaging performance include astigmatism, chromatic aberration, and spherical aberration. |
| Adding an aplanatic meniscus lens to an achromatic lens can increase relative aperture without introducing additional spherical aberration. |
| In De Natura Locorum he gives a diagram which shows light being refracted by a spherical glass container full of water. |
