To compare four instruments used to measure intraocular pressure. Corvis - st, noncontact , icare and applanation tonometers are compared
Not Applicable
- Registration Number
- CTRI/2015/07/006030
- Lead Sponsor
- ETHRADHAMA SUPERSPECIALITY EYE HOSPITA
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Open to Recruitment
- Sex
- Not specified
- Target Recruitment
- 500
Inclusion Criteria
Patients attending the general outpatient department at our center, who are willing to sign the informed consent are enrolled in the study. Patients between 20 - 40 years of age, with healthy cornea are included in the study. One eye of each patient is included
Exclusion Criteria
-Anterior segment disease (keratitis, corneal ectasias, post keratoplasty, degenerations, dystrophies)
-Previous history of refractive surgeries
-Known cases of glaucoma either primary or secondary
-History of ocular trauma
-Astigmatism > +/- 4D
-IOP > 40 mm of Hg with corneal oedema
-Posterior segment disorders
Study & Design
- Study Type
- Observational
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method To compare IOP assessment of Corvis â?? ST with AT, NCT and Icare tonometer readingsTimepoint: Six months from the time of recuitment
- Secondary Outcome Measures
Name Time Method To assess the variation in IOP recording with the above instruments in eyes with different ranges of central corneal thickness i.e., thin cornea â?¤535 microns, average cornea 540-560 microns and thick cornea â?¥565 microns .Timepoint: After recruitment outcome will be assessed at the end of 6 months along with primary outcome