| Peripheral refraction in different ethnicities P Kang, P Gifford, P McNamara, J Wu, S Yeo, B Vong, H Swarbrick Investigative Ophthalmology & Visual Science 51 (11), 6059-6065, 2010 | 100 | 2010 |
| Corneal versus ocular aberrations after overnight orthokeratology P Gifford, M Li, H Lu, J Miu, M Panjaya, HA Swarbrick Optometry and Vision Science 90 (5), 439-447, 2013 | 89 | 2013 |
| A clinical evaluation of Systane P Gifford, BJW Evans, J Morris Contact Lens and Anterior Eye 29 (1), 31-40, 2006 | 80 | 2006 |
| Can manipulation of orthokeratology lens parameters modify peripheral refraction? P Kang, P Gifford, H Swarbrick Optometry and Vision Science 90 (11), 1237-1248, 2013 | 70 | 2013 |
| The future of myopia control contact lenses P Gifford, KL Gifford Optometry and Vision Science 93 (4), 336-343, 2016 | 68 | 2016 |
| Treatment zone decentration during orthokeratology on eyes with corneal toricity VK Maseedupally, P Gifford, E Lum, R Naidu, D Sidawi, B Wang, ... Optometry and Vision Science 93 (9), 1101-1111, 2016 | 66 | 2016 |
| Central and paracentral corneal curvature changes during orthokeratology V Maseedupally, P Gifford, E Lum, H Swarbrick Optometry and Vision Science 90 (11), 1249-1258, 2013 | 63 | 2013 |
| BCLA CLEAR-Effect of contact lens materials and designs on the anatomy and physiology of the eye PB Morgan, PJ Murphy, KL Gifford, P Gifford, B Golebiowski, L Johnson, ... Contact Lens and Anterior Eye 44 (2), 192-219, 2021 | 55 | 2021 |
| Reducing treatment zone diameter in orthokeratology and its effect on peripheral ocular refraction P Gifford, M Tran, C Priestley, V Maseedupally, P Kang Contact Lens and Anterior Eye 43 (1), 54-59, 2020 | 53 | 2020 |
| Near binocular visual function in young adult orthokeratology versus soft contact lens wearers K Gifford, P Gifford, PL Hendicott, KL Schmid Contact Lens and Anterior Eye 40 (3), 184-189, 2017 | 52 | 2017 |
| BCLA CLEAR–Contact lens optics K Richdale, I Cox, P Kollbaum, MA Bullimore, RC Bakaraju, P Gifford, ... Contact Lens and Anterior Eye 44 (2), 220-239, 2021 | 40 | 2021 |
| Mechanism for corneal reshaping in hyperopic orthokeratology P Gifford, V Au, B Hon, A Siu, P Xu, HA Swarbrick Optometry and Vision Science 86 (4), e306-e311, 2009 | 40 | 2009 |
| Time course of corneal topographic changes in the first week of overnight hyperopic orthokeratology P Gifford, HA Swarbrick Optometry and Vision Science 85 (12), 1165-1171, 2008 | 39 | 2008 |
| Ocular aberrations and visual function with multifocal versus single vision soft contact lenses P Gifford, T Cannon, C Lee, D Lee, HF Lee, HA Swarbrick Contact Lens and Anterior Eye 36 (2), 66-73, 2013 | 36 | 2013 |
| Zone of clear single binocular vision in myopic orthokeratology KL Gifford, P Gifford, PL Hendicott, KL Schmid Eye & contact lens 46 (2), 82-90, 2020 | 35 | 2020 |
| Refractive changes from hyperopic orthokeratology monovision in presbyopes P Gifford, HA Swarbrick Optometry and Vision Science 90 (4), 306-313, 2013 | 35 | 2013 |
| Corneal thickness changes in hyperopic orthokeratology measured by optical pachometry P Gifford, A Alharbi, HA Swarbrick Investigative ophthalmology & visual science 52 (6), 3648-3653, 2011 | 34 | 2011 |
| Stability of peripheral refraction changes in orthokeratology for myopia KL Gifford, P Gifford, PL Hendicott, KL Schmid Contact Lens and Anterior Eye 43 (1), 44-53, 2020 | 32 | 2020 |
| The effect of treatment zone diameter in hyperopic orthokeratology P Gifford, HA Swarbrick Ophthalmic and Physiological Optics 29 (6), 584-592, 2009 | 26 | 2009 |
| Variation in normal corneal shape and the influence of eyelid morphometry V Maseedupally, P Gifford, H Swarbrick Optometry and Vision Science 92 (3), 286-300, 2015 | 25 | 2015 |
