Abstract:Objective: To evaluate the effect of cycloplegiaon new ocular biometry measurements using the IOLMaster 700 and OA-2000 biometers and assess the differences and agreements between the two devices. Methods: In this prospective, comparative, observational study of ocular measurements on 133 cataracts, measurements of axial length (AL), mean keratometry (Km), anterior chamber depth (ACD), lens thickness (LT), central corneal thickness (CCT) and white-to-white (WTW) were performed by a single operator using the two devices before and after pupil dilation. The measurement order of the two devices was determined according to the random number table. A paired t-test was applied to evaluate the differences with and without cycloplegia on each device. Bland-Altman plots and a paired t-test were used to evaluate the agreements and differences between the two devices with and without cycloplegia. Results: Cycloplegia had no significant effect on AL or Km. However, ACD and CCT significantly increased by 0.06 mm and 2-3 μm post-cycloplegia on both devices. The IOLMaster 700 LT measurements significantly decreased by 0.01 mm (t=-6.26, P<0.001) and WTW increased by 0.12 mm (t=7.06, P<0.001) after pupil dilation. ACD measurements with OA-2000 were higher by 0.04 mm (t=-13.36, P<0.001; t=-15.08, P<0.001) and LT by 0.07 mm (t=-11.11, P<0.001; t=-8.42, P<0.001), which were statistically significant, compared to the IOLMaster 700 before and after pupil dilation, while CCT was smaller by 17 μm (t=30.55, P<0.001; t=28.80, P<0.001). The 95% limits of agreement in both devices were -0.79 to 0.81 mm pre-cycloplegia and -0.44 to 0.81 mm post-cycloplegia. All measurements had good agreements between the two devices, except for WTW. Conclusions: Cycloplegia affects ACD and CCT, but not AL or Km measurements. LT decreased and WTW increased on the IOLMaster 700 after pupil dilation. Generally, there is good agreement between the IOLMaster 700 and OA-2000, except for WTW. Thus, either can be used for the preoperative examination of cataracts.
Goebels S, Pattmöller M, Eppig T, et al.Comparison of 3 biometry devices in cataract patients. J Cataract Refract Surg, 2015, 41(11): 2387-2393. DOI: 10.1016/j.jcrs.2015.05.028.
[2]
Reitblat O, Levy A, Kleinmann G, et al.Accuracy of intraocular lens power calculation using three optical biometry measurement devices: The OA-2000, Lenstar-LS900 and IOLMaster-500. Eye (Lond), 2018, 32(7):1244-1252. DOI: 10.1038/s41433-018-0063-x.
[3]
Arriola-Villalobos P, Almendral-Gomez J, Garzon N, et al.Agreement and clinical comparison between a new swept-source optical coherence tomography-based optical biometer and an optical low-coherence reflectometry biometer. Eye (Lond), 2017, 31(3): 437-442. DOI: 10.1038/eye.2016.241.
[4]
Srivannaboon S, Chirapapaisan C, Chonpimai P, et al.Clinical comparison of a new swept-source optical coherence tomography-based optical biometer and a time-domain optical coherence tomography-based optical biometer. J Cataract Refract Surg, 2015, 41(10): 2224-2232. DOI: 10.1016/j.jcrs. 2015.03.019.
Norrby S.Sources of error in intraocular lens power calculation. J Cataract Refract Surg, 2008, 34(3): 368-376. DOI: 10.1016/j.jcrs.2007.10.031.
[7]
Olsen T.Calculation of intraocular lens power: A review. Acta ophthalmol Scand, 2007, 85(5): 472-485.
[8]
Sheng H, Bottjer CA, Bullimore MA.Ocular component measurement using the Zeiss IOLMaster. Optom Vis Sci, 2004, 81(1): 27-34.
[9]
McAlinden C, Wang Q, Gao R, et al. Axial length measurement failure fates with biometers using swept-source optical coherence tomography compared to partial-coherence interferometry and optical low-coherence interferometry. Am J Ophthalmol, 2017, 173: 64-69. DOI: 10.1016/j.ajo.2016.09.019.
[10]
Shajari M, Cremonese C, Petermann K, et al.Comparison of axial length, corneal curvature, and anterior chamber depth measurements of 2 recently introduced devices to a known biometer. Am J Ophthalmol, 2017, 178: 58-64. DOI: 10.1016/j.ajo.2017.02.027.
[11]
Khambhiphant B, Sasiwilasagorn S, Chatbunchachai N, et al.Effect of pupillary dilation on Haigis formula-calculated intraocular lens power measurement by using optical biometry. Clin Ophthalmol, 2016, 10: 1405-1410. DOI: 10.2147/OPTH.S109797.
[12]
Khambhiphant B, Chatbunchachai N, Pongpirul K.The effect of pupillary dilation on IOL power measurement by using the IOLMaster. Int Ophthalmol, 2015, 35(6): 853-859. DOI: 10.1007/s10792-015-0063-9.
[13]
Adler G, Shahar J, Kesner R, et al.Effect of pupil size on biometry measurements using the IOLMaster. Am J Ophthalmol, 2015, 159(5): 940-944. DOI: 10.1016/j.ajo.2015.01.025.
Eibschitz-Tsimhoni M, Tsimhoni O, Archer SM, et al.Effect of axial length and keratometry measurement error on intraocular lens implant power prediction formulas in pediatric patients. J AAPOS, 2008, 12(2): 173-176.
Heatley CJ, Whitefield LA, Hugkulstone CE.Effect of pupil dilation on the accuracy of the IOLMaster. J Cataract Refract Surg, 2002, 28(11): 1993-1996.
[18]
Huang J, McAlinden C, Su B, et al. The effect of cycloplegia on the lenstar and the IOLMaster biometry. Optome Vis Sci, 2012, 89(12): 1691-1696. DOI: 10.1097/OPX.0b013e3182772f4f.
[19]
Rodriguez-Raton A, Jimenez-Alvarez M, Arteche-Limousin L, et al.Effect of pupil dilation on biometry measurements with partial coherence interferometry and its effect on IOL power formula calculation. Eur J Ophthalmol, 2015, 25(4): 309-314. DOI: 10.5301/ejo.5000568.
[20]
Zhu X, Chen M, Dai J, et al.The effect of 0.5% tropicamide/0.5% phenylephrine mixed eye drop in Chinese adults with myopia and its inter-eye difference in refractive outcomes. Curr Med Res Opin, 2014, 30(3): 481-487. DOI: 10.1185/03007995.2013.861348.
[21]
Polat N, Gunduz A.Effect of cycloplegia on keratometric and biometric parameters in keratoconus. J Ophthalmol, 2016, 2016: 3437125. DOI: 10.1155/2016/3437125.
[22]
Raina U, Gupta S, Gupta A, et al.Effect of cycloplegia on optical biometry in pediatric eyes. J Pediatr Ophthalmol Strabismus, 2018, 55(3): 164-170. DOI: 10.3928/01913913-20171129-02.
[23]
Chen Y, Bao YZ, Pei XT.Morphologic changes in the anterior chamber in patients with cortical or nuclear age-related cataract. J Cataract Refract Surg, 2011, 37(1): 77-82. DOI: 10.1016/j.jcrs. 2010.07.029.
Hassan Z, Modis L, Szalai E, et al.Scheimpflug imaged corneal changes on anterior and posterior surfaces after collagen cross-linking. Int J Ophthalmol, 2014, 7(2): 313-316. DOI: 10.3980/j.issn.2222-3959.2014.02.21.
[26]
Rune L, Brautaset MN.Central and peripheral corneal thinning in keratoconus. Cornea, 2013(32): 257-261.
[27]
Lam AK, Wong YZ, Cheng SY.Corneal volume measures for monitoring contact lens induced corneal swelling: A pilot study. Clin Experiment Optom, 2011, 94(1): 93-97.
[28]
Yin H, Deng Y, Qiu L.Comparison of central corneal thickness before and after mydriasis with Mydrin-P. Int J Ophthalmol, 2006, 6(1): 25-26.