Evaluation of INTRACOR surgery effect on visual acuity and refractive error of presbyopic people

Document Type : Original article

Authors

1 1. Assisstant professor of Ophthalmology , Iran University of Medical Sciences, Tehran, Iran

2 2. Optometry Department, Faculty of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

3 3. Student Reseach Committee. MSc in Optometry, Faculty of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Abstract

Background and Aim: Presbyopia is an age-related loss of lens accommodation that results in an inability to focus at near distances. Intracor is a new surgical treatment for presbyopic patients which claim to be a replacement for near spectacle. Due to great desire among patients for not using spectacles, evaluation of efficiency and results of this surgical treatment has a great significant. The purpose of this study was determining visual acuity and refraction after Intracor surgery on presbyopic patients.
 
Materials and Method: In an observational cohort study, 22 eyes (left eye: 11, right eye: 11) of 15 presbyopic patients were enrolled. Refractive error and visual acuity were evaluated before and 12 months after INTRACOR surgery. Patients with history of previous ocular surgery, corneal irregularity or incident of cataract were excluded. Statistical analyzes was performed by SPSS-19 software. Paired T-test and Wilcoxon signed ranked test was used.
 
Results: Mean age of patients was 50.1 ± 4 years (range 44.5 to 66 years). Average monocular uncorrected distance visual acuity increased from 0.74 ± 0.20 decimal at base line to 0.85 ± 0.16 decimal at last visit (P< 0.01). Average binocular uncorrected distance visual acuity increased from 0.85 ± 0.16 decimal at base line to 0.92 ± 0.09 decimal at last visit (P < 0.05). Average monocular near visual acuity with distance correction increased from 0.27 ± 0.07 decimal at base line to 0.39 ± 0.15 decimal at last visit. Average binocular near visual acuity with distance correction increased from 0.30 ± 0.07 decimal at base line to 0.50 ± 0.21 decimal at last visit (P < 0.01). Average near visual acuity without distance correction increased from 0.23 ± 0.05 decimal at base line to 0.68 ± 0.24 decimal at last visit (P< 0.001). Average of monocular spherical refraction and monocular and binocular corrected near visual acuity had a statistically significant decrease. (P< 0.001)
 
Conclusion: There was a statistically significant improvement in both distance and near visual acuity after Intracor surgery. Improvement in near visual acuity was more significant.

Keywords

References

  1. Patel I, West SK. Presbyopia: prevalence, impact, and interventions. 2007. Community Eye Health 20(63): 40-41.
  2. Becker KA, Jaksche A, Holz FG. PresbyLASIK: treatment approaches with the excimer laser. Ophthalmologe 2006; 103(8):667-72.
  3. Tejas D. Fooling the Hands of Time: Viable Presbyopia Solutions. 2009.  Cataract & refractive surgery today Europe. Available at: URL: http://bmctoday.net .Accessed oct,2012.
  4. Gueidj T,Danan A,Lebuisson A. In-vivo architectural analysis intrastromal insicions after INTRACOR surgery usinf Fourier-domain OCT and Scheimpflug imaging. J Emme- tropia. 2011;2(2):85-91.
  5. Bohac M, Gabrić N, Anticić M, Draca N, Dekaris I. First results of  INTRACOR procedure in Croatia. Coll Antropol 2011;35(2):161-6.
  6. Probst L, Chan C. Femtosecond Cataract surgery : A primer. 1th ed. USA: SLACK incorporated; 2012. P. 111.
  7. Holzer MP, Knorz MC, Tomalla M, Neuhann TM, Auffarth GU. Intrastromal femtosecond laser presbyopia correction: 1-year results of a multicenter study.  J Refract Surg 2012; 28(3):1828.
  8. Holzer MP, Mannsfeld A, Ehmer A, Auffarth GU. Early outcomes of INTRACOR femtosecond laser treatment for presbyopia. J Refract Surg 2009; 25(10):855-61.
  9. Ruiz LA, Cepeda LM, Fuentes VC. Intrastromal correction of presbyopia using a femtosecond laser system. J Refract Surg 2009; 25(10):847-54.
  10. Ioannis G. Pallikaris. Novel optical approaches drive cornea-based presbyopia correction. 2011. Ocular Surgery News Asia Pacific Edition. Available at: URL: http://www.healio.com .Accessed oct,2012.
  11. MenassaN, FittingA, Gerd UA, HolzerMP. Visual outcomes and corneal changes after intrastromal femtosecond laser correction of presbyopia. Journal of cataract and refractive surgery 2011; 38(5):765-773.
  12. Thomas BC, Fitting A, Auffarth GU, Holzer MP. Femtosecond laser correction of presbyopia (INTRACOR) in emmetropes using a modified pattern. Journal of Refractive Surgery 2012;28(12):872-878.
  13. Fitting A, Rabsilber T, Auffarth G, Holzer M. Cataract surgery after femtosecond laser intrastromal presbyopia treatment. Journal of cataract and refractive surgery 2012;38(7):1293-1297.
  14. Ashok G, Jorge L. FEMTOSECOND LASER Techniques and Technology.1th ed. India: Jaypee Brothers Medical Publisher; 2012. P.22.
The Scientific Journal of Rehabilitation Medicine
Volume 3, Issue 2 - Serial Number 2
July and August 2014
Pages 39-45

Files

History

  • Receive Date: 06 July 2013
  • Revise Date: 24 September 2013
  • Accept Date: 17 December 2013
  • First Publish Date: 22 June 2014

Share

How to cite

Statistics