Tonometer Diaton Goldmann ORA DCT AAO Poster Review

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Tonometer Diaton Goldmann ORA DCT AAO Poster Review


By: DevelopAll (82 month(s) ago)

Diaton tonometer allows to measure IOP through eyelid and sclera

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COMPARISON OF ACCURACY OF DIATON TRANSPALPEBRAL TONOMETER VERSUS GOLDMANN APPLANATION TONOMETER, DYNAMIC CONTOUR TONOMETER AND OCULAR RESPONSE ANALYZER Henry D. Perry, MD (1), prof S . E . Avetisov MD (2), prof V . P . Erichev MD (2) , А.А. Antonov MD (2), А. R . Illarionova MD ( 3 ) 1. Ophthalmic Consultants Of Long Island 2. Eye Diseases Research Institute of Russian Academy of Medical Sciences, Moscow 3.Central Clinical Hospital of the Administrative Department of the President of Russian Federation, Moscow PURPOSE To compare intraocular pressure measurements obtained with the diaton transpalpebral tonometer with those from ocular response analyzer (ORA), dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in patients diagnosed with primary open-angle glaucoma (POAG) and glaucoma suspects, and to determine the effects of central corneal thickness (CCT) and corneal hysteresis (CH) on intraocular pressure (IOP) measurements with these devices 40 patients (80 eyes) age 42-83 years with POAG and glaucoma suspects were included in the study. PATIENTS METHODS IOP was estimated using: Goldmann applanation tonometer ( shin nippon , Japan) , O cular R esponse A nalyzer ( R eichert , USA) , Dynamic Contour Tonometer ( Z iemer ophthalmic systems, Switzerland ), Transpalpebral Non-corneal Tonometer Diaton (GRPZ, Russia) CCT was estimated using ultrasonic pachymeter that was built-in ORA The average of ORA (corneal compensated IOP [IOP- ORAcc ] and Goldmann -correlated IOP [IOP- ORAg ]), DCT, GAT, and Diaton tonometer levels were compared and the devices were examined with respect to CCT and CH Spearman's correlation tests were used for statistical analysis Mean CCT was 561,2±32,4mum and mean CH was 10.6+/-2.0 mmHg Mean IOP , measured with the tonometers that were used in the research RESULTS The performed analysis of correlation between IOP meanings shows high conformity of results of Diaton with IOP- ORAcc and DCT IOP difference, mmHg Transpalpebral Tonometry is an accurate method of IOP measurement that is also independent from the biomechanical characteristics of cornea. It can be recommended for IOP measurements of patients diagnosed with glaucoma including those cases where cornea pathology or cornea characteristics have been altered CONCLUSIONS IOP , mmHg M ± σ Min/max GAT 18,4 ± 4,1 11 / 31 ORA IOPg 18,4 ± 3,5 12,6 / 28,0 ORA IOPcc 18,2 ± 3,4 10,5 / 29,7 DCT 18,9 ± 4,1 10,1 / 33 D iaton 17,0 ± 3,0 10 / 28 DIATON ORA IOPcc DCT GAT DIATON 0,96 0,87 0,61 ORA IOPcc 0,96 0,89 0,56 DCT 0,87 0,89 0,73 GAT 0,61 0,56 0,73 The differences between the measurements of DCT, ORA and Diaton were statistically significant Correlated rates relations Difference between indexes of Diaton and other tonometers that were used during the study The differences between the measurements of DCT, ORA and Diaton were statistically significant Research exclusion criteria: Patients with recent eye surgery ; Patients with high m yopia or hypermetropia; Patients with cornea, sclera or lid pathology ; Patients with visual acuity less than 0,1 Diaton Tonometry is a new Non-Corneal approach to measuring IOP through the eyelid IOP measurement with Diaton can be realized the patient being in sitting position The measurement is realized through the upper eyelid and over the sclera, not the cornea

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