| Device for measuring arterial stiffness by the aplanatic tonometry piece. |
| The aplanatic correction avoids the spherical deformation of what you see. |
| The aplanatic condenser is not corrected for color, hence objectionable color fringes are produced around the field of view diaphragm. |
| A lens in which the spherical aberration is corrected is said to be aplanatic. |
| These locations for which spherical correction has been optimized are called the aplanatic points. |
| It is shown to illustrate how a useful lens can be built using the aplanatic point of a sphere despite the fact that it lies within the glass. |
