Validity of a prototype surgical aberrometer

Uday Bhatt, Sunil Shah, Harminder Dua, James Wolffsohn

Research output: Contribution to journalConference abstractpeer-review


Purpose: A study to validate a prototype Hartmann-Shack (HS) wavefront aberrometer.
Methods: The dynamic range was assessed using a calibrated model eye. It was validated against a conventional HS-aberrometer (Topcon KR1W) in 75 eyes using both instruments in random order. Additionally, intra-sessional repeatability was tested.
Results: The aberrometer showed a large dynamic range of +21.0 D to −25.0 D. It was comparable to a conventional HS aberrometer for spherical-equivalent SE (MD ± 95% CI: 0.02 ± 0.49D; correlation: r = 0.995, p < 0.001), astigmatic components (J0: 0.02 ± 0.15D; r = 0.977, p < 0.001; J45: 0.03 ± 0.28; r = 0.666, p < 0.001) and HOAs RMS (0.02 ± 0.20D; r = 0.620, p < 0.001). Intra-sessional repeatability correlation was also excellent (SE = 1.000, p < 0.001; astigmatic-components J0 = 0.998, p < 0.001, J45 = 0.980, p < 0.01; HOAs RMS = 0.961, p < 0.001).
Conclusions: This study confirms the validity of the prototype aberrometer. The prototype aberrometer can measure continuously to provide direct feedback of the optical status of the eye during surgery.
Original languageEnglish
Article number84
Pages (from-to)109
Number of pages1
JournalClinical and Experimental Ophthalmology
Issue numberS1
Early online date30 Oct 2014
Publication statusPublished - 30 Nov 2014
EventRANZCO 46th annual scientific congress - Brisbane, Australia
Duration: 22 Nov 201426 Nov 2014

Bibliographical note

Special Issue: The Royal Australian and New Zealand College of Ophthalmologists, 46th Annual Scientific Congress, 22–26 November 2014.


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