[Glaucoma diagnostics and corneal thickness].
In recent years the role of pachymetry in the correction of applanation tonometry values was controversially disputed. At the present time it is undoubtedly proven that central corneal thickness affects the accuracy of applanation tonometry. The dimension of this influence is 1 mmHg of pressure per 25 microm of change in corneal thickness. It is important to remember that Goldmann and Schmidt calibrated the applanation tonometer according to the central corneal thickness of their population by using the optical method. Therefore, it is first necessary to determine the corneal thickness for each examiner and his methods. The linear correction formula should be used only in the range of corneal thickness in which the formula was determined. The correction according to Orssengo and Pye and further developments in tonometry may offer alternatives for better estimation of intraocular pressure.
von Eicken
J
J
Augenklinik, Dietrich-Bonhoeffer-Klinikum, Neubrandenburg. aug@dbk-nb.de
Kohlhaas
M
M
Höh
H
H
D003315:Cornea / Q000503:physiopathology*; D005901:Glaucoma / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology*; D006801:Humans; D007429:Intraocular Pressure; D009798:Ocular Hypertension / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology*; D017410:Practice Guidelines as Topic; D010818:Practice Patterns, Physicians'; D015203:Reproducibility of Results; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D012680:Sensitivity and Specificity; D014065:Tonometry, Ocular / Q000379:methods*