Effects of non-contact tonometry on refraction

Area of Science:

• Ophthalmology
• Optometry
• Vision Science

Background:

• Refractive error assessment is crucial for vision correction.
• Intraocular pressure measurement using tonometry is a standard eye examination procedure.
• Potential impact of tonometry on refractive error requires investigation.

Purpose of the Study:

• To evaluate the effect of noncontact tonometry on subjective spherical refractive error.
• To determine if tonometry influences objective or subjective visual acuity measurements.
• To compare refractive error changes in eyes that underwent tonometry versus control eyes.

Main Methods:

• Subjective refraction measurements were performed before and after noncontact tonometry.
• A control group of fellow eyes without tonometry was included for comparison.
• Spherical refractive error was the primary outcome measure.

Main Results:

• No statistically significant changes in spherical refractive error were detected after noncontact tonometry.
• The refractive error measurements in the tested eyes were comparable to the control eyes.
• Tonometry did not appear to induce measurable changes in refractive error.

Conclusions:

• Noncontact tonometry does not appear to affect subjective spherical refractive error.
• The procedure is likely safe for patients undergoing refractive error assessment.
• Further studies could explore potential effects on other visual parameters.