The Keratograph	Contact Lens fitting
Pupillometry-Software	Imaging-Software
Studies / Publications	Technical data

Keratograph Studies/Publications

Here you can find some articles about the OCULUS Keratograph.

Corneal Topographic Changes in a Case of Limbal Conjunctival Carcinoma

The impact of limbal lesions on corneal topography is well known in the case of pterygia1–7 and perilimbal dermoids4 but has not been evaluated in the case of limbal tumors (MEDLINE search by http://www.pubmed.org. Accessed March 27, 2004).
We report a case of limbal conjunctival carcinoma in which induced astigmatism was evaluated by pre- and postoperative corneal topography.

Corneal Topographic Changes [417 KB]

Pre–Excimer Laser and Post–Excimer Laser

Refractive Surgery Measurements of Scotopic Pupil Diameter Using 2 Pupillometers

The accurate measurement of the pupil before photorefractive keratectomy (PRK) or LASIK represents an important and essential step when selecting refractive patients, increasing the safety of refractive surgery procedures and reducing subjective night vision disturbances. If the pupil enlarges beyond the optical zone created by the laser ablation, light rays could pass through the untreated cornea and through the edge of the treatment zone, disturbing vision with glare, halos, ghost images, and lower contrast sensitivity.

Pre–Excimer Laser and Post–Excimer Laser [326 KB]

New Possibilities of Corneal Diagnostics Using Videokeratometry

Part 2

The function of corneal indices is the reduction of the wealth of measuring results supplied by the keratograph into a small number of characteristic values which permit statements regarding the shape of the corneal surface. Corneal indices can be calculated from various types of data, the most common being sagittal radii (5, 12, 16, 20, 21).

New Possibilities of Corneal Diagnostics, Part2 [570 KB]

New Possibilities of Corneal Diagnostics Using Videokeratometry

Part 1

The market introduction in 1989 of the first videokeratometer based on the Placido principle marked the beginning of a new phase in corneal surface diagnostics. With earlier instruments local corneal radii were calculated by means of distance comparison, i.e. by comparing the distances between the individual rings of the Placido disk as reflected by the cornea with the corresponding distances in stored images of calibration globes of different sizes.

New Possibilities of Corneal Diagnostics, Part1 [406 KB]