Assessment of risk factors for the development of keratectasia after excimer laser keratorefractive surgery

2018 ◽  
Vol 16 (4) ◽  
pp. 47-49
Author(s):  
V. P. Fokin ◽  
◽  
E. G. Solodkova ◽  
V. A. Breev ◽  
◽  
...  
1985 ◽  
Vol 100 (5) ◽  
pp. 741-742 ◽  
Author(s):  
Danièle Aron-Rosa ◽  
Françoise Carre ◽  
Patrice Cassiani ◽  
Monique Delacour ◽  
Michel Gross ◽  
...  

2018 ◽  
Vol 15 (2S) ◽  
pp. 197-204
Author(s):  
I. A. Mushkova ◽  
N. V. Maychuk ◽  
R. A. Makarov ◽  
G. M. Chernakova

Purpose: to identify risk factors for the development of asthenopic syndrome (AS) in patients with moderate to high myopia after keratorefractive surgery (KRS).Materials and methods. 122 patients (244 eyes) with medium and high myopia underwent a standard pre-operative examination of patients before KRS. The special methods of examinations were the study of reserves of relative accommodation (RRA) and the volume of absolute accommodation (VAA), and the accomodomography; the vision characteristics was determined on a four-point color test by E.B. Belostotsky, S.Y. Friedman at distances of 5.00 and 0.33 m, fusional reserves — with synoptophor. Patients survey was held with CISS questionnaire to detect the presence of AS.Results: There were no complications after KRS in all cases. Uncorrected visual acuity was the same or higher than maximal corrected before surgery in 1 week after KRS. Patents were divided into 2 groups according to results of CISS survey: 88% — without AS, 12% — with signs of AS. Retrospective analysis of pre-operative data of the patients with AS has shown that a combination of an absence of binocular vision with a pronounced decrease in fusion reserves, reserves of relative accommodation and volume of absolute accommodation is prognostically unfavorable factors in patients with myopia.Conclusion: All patients with moderate and high myopia have the refractive errors, there is no binocular vision in 12.3% patients. More significant errors of accommodation and binocular function were registered in patients with postoperative AS vs. patients without AS. Low fusion reserves and absence of binocular vision don’t allow to adopt for KRS results. This group of patients should be separated for pre-operative functional preparation. 


Ophthalmology ◽  
2008 ◽  
Vol 115 (12) ◽  
pp. 2181-2191.e1 ◽  
Author(s):  
Daniel G. Dawson ◽  
J. Bradley Randleman ◽  
Hans E. Grossniklaus ◽  
Terrence P. O'Brien ◽  
Sander R. Dubovy ◽  
...  

2005 ◽  
Vol 139 (4) ◽  
pp. 735-737 ◽  
Author(s):  
Jenna M. Burka ◽  
Kraig S. Bower ◽  
David L. Cute ◽  
Richard D. Stutzman ◽  
Prem S. Subramanian ◽  
...  

2008 ◽  
Vol 40 (4) ◽  
pp. 243-246 ◽  
Author(s):  
R.J. Hope ◽  
E.D. Weber ◽  
K.S. Bower ◽  
J.P. Pasternak ◽  
D.H. Sliney

2019 ◽  
Vol 16 (1S) ◽  
pp. 27-32
Author(s):  
S. E. Avetisov ◽  
A. A. Tyurina ◽  
Z. V. Surnina ◽  
O. M. Dovgileva ◽  
E. V. Sukhanova

Purpose: to conduct a morphometric assessment of the corneal nerves state after laser keratorefractive surgery using laser confocal microscopy and the software Liner 1.2S. Patients and methods. 40 eyes of 20 patients received LASIK to correct a mean refractive error of –4.5 ± 1.9 diopters (range, –2.25 to –8.25 diopters). The stroma was ablated with a Teneo Technolas 317P excimer laser. Corneas were examined by laser corneal confocal microscopy (HRT III with Rostock Cornea Module) before and in 1, 3, and 6 months after LASIK. Images were analyzed with software that automatically computes coefficients of anisotropy and orientation symmetry of corneal nerves. Result. At 1 and 3 months after surgery, the center corneal nerves were completely absent. At 1, 3 and 6 months after surgery, the paracentral corneal nerves were detected and the coefficient of anisotropy were statistically significantly reduced compared with the preoperative rates. At 6 months after surgery, both central and peripheral corneal nerves were detected and the coefficient of anisotropy were statistically significantly reduced compared with the preoperative rates. Conclusion. As a result of the study, the central corneal nerves were first detected at 6 months after surgery, whereas the paracentral cornea nerves were detected already after 1 month. At 6 months after surgery, the coefficient of anisotropy in the central of cornea statistically significant decreased compared to the preoperative rates. At all stages of the study after surgery, the anisotropy coefficient in the cornea paracentral statistically significant decreased compared with preoperative.


Sign in / Sign up

Export Citation Format

Share Document