Study wants to test reliability Dynamic Contour Tonometry (DCT) in measuring intraocular pressure (IOP) and Ocular Pulse Amplitude (OPA). IOP values obtained with DCT will then be compared with IOP values obtained with Goldmann Applanation Tonometry (GAT), actually the gold standard technique.
Healthy volunteers recruited among subjects who underwent a routine ophthalmologic evaluation or among students and workers both at our clinic, will undergo a series of 5 DCT to evaluate eventual differences among the measurements. A diurnal IOP curve performed though GAT, composed of 3 measurements (9am, noon, 4pm) will be taken 1 to 7 days before the DCT. At the end of the DCT measurements a last GAT will be taken to control eventual IOP changes versus previous GAT values obtained through the diurnal curve. After 3 weeks observers will contact patients to record eventual adverse events. If examiners consider it as necessary, a safety ophthalmological evaluation will then be performed.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
102
Healthy volunteers recruited among subject that underwent a routine ophthalmologic evaluation or among both students and workers at our clinic, will undergo a series of 5 Dynamic contour tonometries to evaluate eventual differences among measurements. Patients will be controlled for 30 days. A diurnal IOP curve performed though GAT, composed of 3 measurements (9am, noon, 4pm) will be taken 1 to 7 days before the DCT. At the end of the DCT measurements a last GAT will be taken to control eventual IOP changes versus previous GAT values obtained through the diurnal curve.
University of Catanzaro - Eye Department
Catanzaro, Catanzaro, Italy
IOP expressed in mmHg
5 consecutive valid DCT measurements will be taken. After test-retest reliability of these DCT measurements will then be calculated (difference expressed in mmHg between 1st and 5th DCT measurements of IOP. Coefficient of Variation will also be calculated).
Time frame: measurements will be taken in a single day, in approximately 30 minutes.
OPA expressed in mmHg
5 consecutive valid DCT measurements will be taken. After test-retest reliability of these DCT measurements will then be calculated (difference expressed in mmHg between 1st and 5th DCT measurements of OPA. Coefficient of Variation will also be calculated).
Time frame: measurements will be taken in a single day, in approximately 30 minutes.
IOP difference (expressed in mmHG) between first GAT and DCT
The diurnal tonometric curve (i.e. IOP at 9am, noon, 4pm) will be measured using GAT. After 1 to 7 days, 5 different IOP measurements recorded every 2 minutes (+/- 1) will be measured at 9am (+/- 15 minutes) using DCT. The difference between GAT and DCT values will be calculated.
Time frame: partecipants will undergo a GAT diurnal tonometric curve (one day duration) and after one to seven days will undergo 5 DCT (approx. duration 30 minutes)
IOP difference (expressed in mmHG) between DCT and last GAT
5 different IOP measurements recorded every 2 minutes (+/- 1) will be measured at 9am (+/- 15 minutes) using DCT. After 1-2 minutes a single GAT measurement will be recorded. The difference between GAT and DCT values will be calculated.
Time frame: partecipants will undergo 5 DCT and after these, to a single GAT measurement(approx. duration 30 minutes)
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