OPHTHALMOMETER MEASURING TECHNIQUE

Peripheral Readings


Peripheral measurements with the ophthalmometer or keratometer do not give a very accurate representation of the corneal shape since at each fixation point the readings are being taken from two points 3 mm or greater apart.  This along with the complex geometry of the cornea makes interpretation of the readings difficult.  It may help determine if a particular cornea flattens more or less than average but does not give accurate values.

                                                        is now available and gives more accurate information than the keratometer for peripheral corneal shape.