Effect of Goldmann Applanation Tonometry on Biometry Measurements
Research type
Research Study
Full title
The effect of Goldmann applanation tonometry on Biometry measurements and predicted refractive error
IRAS ID
179557
Contact name
Rhys Harrison
Contact email
Sponsor organisation
Great Western Hospital Foundation Trust
Duration of Study in the UK
0 years, 6 months, 0 days
Research summary
In eye clinics two procedures are frequently performed. The first is Goldmann Applanation Tonometry (GAT) which forms a part of every ophthalmic examination. GAT allows the measurement of eye pressure. The other procedure is biometry. This is a non-contact examination which takes precise measurements of the eye which allows selection of a lens to be used for cataract surgery (replacing the natural lens of the eye with an artificial one).
Any patient undergoing cataract surgery, a very common operation, requires both of these procedures done pre-operatively. GAT involves contact with the eye surface and it is logical to assume that this would effect the precise measurements taken of the eye by the biometry measurements. However there is very limited information on how GAT may affect the accuracy of the biometry measurements. The study will involve patients attending cataract surgery pre-operative assessment having biometry measurements, followed by examination (including GAT) following this the biometry would be repeated. The biometry measurements following GAT would be compared to the pre-GAT biometry to assess how it had changed.
REC name
East of England - Cambridgeshire and Hertfordshire Research Ethics Committee
REC reference
15/EE/0193
Date of REC Opinion
14 May 2015
REC opinion
Further Information Favourable Opinion