Comparing predictability between eyes after bilateral laser in situ keratomileusis: A theoretical analysis of simultaneous versus sequential procedures☆
Section snippets
Study design
Ninety-eight patients received sequential bilateral LASIK treatments with subsequent follow-up. The average time between the two eye treatments was 11.6 days. Attempted corrections ranged from 2.30 to 12.00 diopters (D). Patients were followed at 1 week, 1 month, and 3 months after surgery. LASIK procedures were performed by one surgeon (P.S.H.) in a single clinical center.
Patient selection
All patients entered in the study were 21 years of age or older. Patients were excluded if they had spectacle-corrected
Preoperative characteristics
A total of 196 eyes of 98 patients entered the study cohort. The mean age was 38 years (range, 21–58 years). Forty-seven patients (48%) were men and 51 patients (52%) were women. Preoperative manifest spherical equivalent refraction ranged from −2.25 to −16.88 D with a mean of −6.99 D and standard deviation (SD) of 3.13 D. There was no difference in the degree of myopia when comparing the preoperative manifest spherical equivalent refraction of the right and left eyes in each patient; the mean
Discussion
Recently, controversies concerning the timing of bilateral LASIK have evoked much debate. Many argue that the benefit/risk ratio favors same-day surgery. Simultaneous procedures are more convenient and avoid anisometropia between eye treatments. A recent study has also found that the risks of simultaneous surgery were not significantly different from sequential surgery.18 Others disagree, citing the potential for bilateral visual loss or simply bilateral patient dissatisfaction, increased
Acknowledgements
The authors thank Marian Rose Catherine Passannante, PhD, and Amiran M. Sheffet, PhD, of the Department of Preventive Medicine and Community Health, UMDNJ-New Jersey Medical School, for their assistance in the statistical analysis.
References (24)
- et al.
Laser in situ keratomileusis for moderate and high myopia and myopic astigmatism
Ophthalmology
(1998) - et al.
Results of laser in situ keratomileusis in different degrees of myopia
Ophthalmology
(1998) - et al.
Laser in situ keratomileusis for myopia and myopic astigmatism
J Cataract Refract Surg
(1998) - et al.
Experience during the learning curve of laser in situ keratomileusis
J Cataract Refract Surg
(1996) - et al.
Excimer laser in situ keratomileusis under a corneal flap for myopia of 2 to 20 diopters
Am J Ophthalmol
(1996) - et al.
Regression and its mechanisms after laser in situ keratomileusis in moderate and high myopia
Ophthalmology
(1998) - et al.
Refractive outcome of radial keratotomydoes the result of the first eye predict outcome in the second eye?
Am J Ophthalmol
(1997) - et al.
Centering corneal surgical procedures
Am J Ophthalmol
(1987) - et al.
Corneal topography of phase III excimer laser photorefractive keratectomy. Optical zone centration analysis. Summit Photorefractive Keratectomy Topography Study Group
Ophthalmology
(1995) - et al.
Results of phase III excimer laser photorefractive keratectomy for myopia. The Summit PRK Study Group
Ophthalmology
(1997)
Characteristics influencing outcomes of excimer laser photorefractive keratectomy. Summit Photorefractive Keratectomy Phase III Study Group
Ophthalmology
Corneal topography of photorefractive keratectomy versus laser in situ keratomileusis. Summit PRK-LASIK Study Group
Ophthalmology
Cited by (17)
Intraocular lens power in bilateral cataract surgery: Whether adjusting for error of predicted refraction in the first eye improves prediction in the second eye
2006, Journal of Cataract and Refractive SurgeryCorrelation of visual and refractive outcomes between eyes after same-session bilateral laser in situ keratomileusis surgery
2003, American Journal of OphthalmologyCitation Excerpt :Previous studies on patients undergoing PRK have suggested a correlation of outcomes between the two eyes.12 Chiang and Hersh11 studied correlation of outcomes between eyes undergoing sequential LASIK surgery (mean time between eyes, 11.6 days). The results of their study were very similar to those of the present study: A highly significant correlation was found in refractive outcomes between the two eyes.
Safety and predictability of laser in situ keratomileusis enhancement by flap reelevation in high myopia
2001, Journal of Cataract and Refractive SurgerySimultaneous vs. bilateral LASIK [5] (multiple letters)
2001, OphthalmologySimultaneous bilateral LASIK [3] (multiple letters)
2000, Journal of Cataract and Refractive SurgeryInterocular biometric parameters comparison measured with swept-source technology
2022, International Ophthalmology
- ☆
Supported in part by an unrestricted grant to the Department of Ophthalmology from Research to Prevent Blindness, Inc., New York, New York.