Clinical comparison of Pulsair non-contact tonometer and Goldmann applanation tonometer in Indian population.
BACKGROUND
Goldmann applanation tonometer (GAT) is the gold standard for Intraocular Pressure (IOP) measurement but has disadvantage of being contact device and problems with portability. The aim of the study was to compare the Keeler's Pulsair noncontact tonometer (NCT) with GAT in Indian Population.


METHODS
Eighty-one subjects were screened from a Glaucoma clinic of a tertiary care centre in North India. The IOP was measured by Pulsair NCT and GAT after explaining the procedure. Central corneal thickness (CCT) was measured to avoid its bias on IOP readings. The data were analyzed using SPSS software.


RESULTS
The mean age of subjects was 49.9±8.8 (mean±SD) years. The mean IOP as taken by Pulsair NCT was 15.79±4.07mmHg and that for GAT was 17.02±4.23mmHg (p=0.062). The mean CCT was 0.536±0.019mm. A positive Pearson's correlation coefficient of 0.909 (p=0.0001) was found between the two instruments. Bland and Altmann analysis showed a fair agreement between the two tonometers at lower IOP range.


CONCLUSIONS
Pulsair NCT can be used as a screening tool for community practices but is not reliable in the subjects with higher IOP range.
Glaucoma Services, Department of Ophthalmology, GSVM Medical College, Kanpur, UP, India. Electronic address: drshalinimohan@gmail.com.
Shalini
S
Mohan
Glaucoma Services, Department of Ophthalmology, GSVM Medical College, Kanpur, UP, India.
Satyaprakash
S
Tiwari
Glaucoma Services, Department of Ophthalmology, GSVM Medical College, Kanpur, UP, India.
Arvind
A
Jain
Glaucoma Services, Department of Ophthalmology, GSVM Medical College, Kanpur, UP, India.
Jaya
J
Gupta
Glaucoma Services, Department of Ophthalmology, GSVM Medical College, Kanpur, UP, India.
Surendra Kumar
SK
Sachan
D000328:Adult; D000368:Aged; D044466:Asian People; D019781:Corneal Topography; D005260:Female; D005901:Glaucoma / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D007194:India; D007429:Intraocular Pressure / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D014065:Tonometry, Ocular / Q000295:instrumentation*
Applanation tonometry; Intraocular pressure; Non-contact tonometer; Presión intraocular; Tonometría de aplanamiento; Tonómetro de no contacto