corneal apex

apex, corneal 

The most anterior point of the cornea when the eye is in the primary position (Fig. A15). It does not automatically coincide with any common reference point (e.g. line of sight). See apical bearing; apical clearance; optical zone of cornea; primary position.
Fig. A15 Palpebral aperture PA and corneal apex CAenlarge picture
Fig. A15  Palpebral aperture PA and corneal apex CA
References in periodicals archive ?
The automatic release mode was used to determine when correct focus and alignment with the corneal apex had been achieved in order to reduce operator-dependent variables which may be associated with manual scanning.
7) Once the lens has settled on the eye the PLTF is thought to be approximately 2[micro]m thick, (12) while the PoLTF, which has proven more difficult to measure, is between l-3[micro]m thick at the corneal apex.
The densitometry readings at the corneal apex were used for the statistics.
The corneal density at the corneal apex was significantly higher in MCD group than in the other groups (pless than 0.
Paracentral measurements are also less accurate compared to those taken at the corneal apex.
In this scenario the epithelium would thin first at the edge of the optic zone, with thinning creeping closer towards the corneal apex over time in line with the back surface profile of the lens (see Figure 3).
Corneal protrusion, thinning at the corneal apex and prominent corneal nerves.
Clearance of the corneal apex --dictated by the sag or vault of the lens--by 0.
The progressive changes in shape, visualisation of the corneal apex, and reduction in corneal pachymetry are well noted in topographic examinations (Figure 2).
It must be held at a 90[degrees] angle to the corneal apex.