Influence of Pterygium on Corneal Biomechanical Properties

Öner, Veysi; Taş, Mehmet; Özkaya, Erdal; Bulut, Asker

doi:10.3109/02713683.2015.1080281

Cited by 10 publications

(7 citation statements)

References 30 publications

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“…Moreover, pterygium was noted to affect corneal biomechanical properties [16,17]. In a recent study by Koç et al, corneal biomechanical changes were also found to occur after pterygium surgery, where all preoperative ORA measured parameters were recorded to be decreased, yet the decrease was statistically nonsignificant [18].…”

Section: Discussionmentioning

confidence: 95%

The effect of strabismus muscle surgery on corneal biomechanics

Gendy¹,

Khalil²,

Eissa³

et al. 2018

Journal of American Association for Pediatric Ophthalmology and

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is properly cited. Purpose. Studying the early effect of different extraocular muscle (EOM) surgeries on corneal biomechanics. Subjects and methods.is is a prospective, nonrandomized, interventional study, in which 42 eyes of 29 candidates for EOM surgery for strabismus correction at Cairo university hospitals, aged 14-37 years, were recruited. All participants had measuring of the visual acuity, refraction (spherical equivalent (SE)), assessment of the EOM motility and muscle balance, sensory evaluation, fundus examination, and assessing the ocular biomechanics using the Ocular response analyzer (ORA, Reichert, INC., Depew, NY) noting the corneal hysteresis (CH) and corneal resistance factor (CRF) preoperatively. Same patients were reassessed using ORA 4 weeks postoperatively following a different standard EOM surgery (recti weakening/strengthening and inferior oblique weakening either (graded recession) according to the surgical indication, and ∆CH and ∆CRF were calculated, each is the preoperative − the postoperative value. Results. ∆CH and ∆CRF � −0.78 ± 1.56 and −0.72 ± 2.15, respectively, and a highly significant difference was found between each of the pre-and postoperative CH and CRF (p < 0.001). 18 eyes had single EOM surgery, while 24 had multiple (2 or 3) EOM surgery; ∆CH in the single group � 1.28 1.5, and ∆CH in the multiple group � 0.4 1.49 (p � 0.07). 23 eyes had EOM weakening surgery, while 18 had combined weakening and strengthening EOM surgery: ∆CH in the weakening group � 1.24 1.77 and ∆CH in combined group � 0.26 1.07 (p � 0.04). A nonsignificant difference was found for ∆CRF (p � 0.53). Conclusion. A different EOM surgery has an early tendency for increase of the postoperative CH specially for muscle weakening procedures (recti recession/inferior oblique muscle weakening).

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Section: Discussionmentioning

confidence: 95%

The effect of strabismus muscle surgery on corneal biomechanics

Gendy¹,

Khalil²,

Eissa³

et al. 2018

Journal of American Association for Pediatric Ophthalmology and

View full text Add to dashboard Cite

show abstract

“…Moreover, pterygium was noted to affect corneal biomechanical properties [ 16 , 17 ]. In a recent study by Koç et al, corneal biomechanical changes were also found to occur after pterygium surgery, where all preoperative ORA measured parameters were recorded to be decreased, yet the decrease was statistically nonsignificant [ 18 ].…”

Section: Discussionmentioning

confidence: 99%

The Effect of Strabismus Muscle Surgery on Corneal Biomechanics

Gendy

Khalil

Eissa

et al. 2018

Journal of Ophthalmology

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Purpose Studying the early effect of different extraocular muscle (EOM) surgeries on corneal biomechanics. Subjects and methods This is a prospective, nonrandomized, interventional study, in which 42 eyes of 29 candidates for EOM surgery for strabismus correction at Cairo university hospitals, aged 14–37 years, were recruited. All participants had measuring of the visual acuity, refraction (spherical equivalent (SE)), assessment of the EOM motility and muscle balance, sensory evaluation, fundus examination, and assessing the ocular biomechanics using the Ocular response analyzer (ORA, Reichert, INC., Depew, NY) noting the corneal hysteresis (CH) and corneal resistance factor (CRF) preoperatively. Same patients were reassessed using ORA 4 weeks postoperatively following a different standard EOM surgery (recti weakening/strengthening and inferior oblique weakening either (graded recession) according to the surgical indication, and ∆CH and ∆CRF were calculated, each is the preoperative − the postoperative value. Results ∆CH and ∆CRF = −0.78 ± 1.56 and −0.72 ± 2.15, respectively, and a highly significant difference was found between each of the pre- and postoperative CH and CRF (p < 0.001). 18 eyes had single EOM surgery, while 24 had multiple (2 or 3) EOM surgery; ∆CH in the single group = −1.28 ± 1.5, and ∆CH in the multiple group = 0.4 ± 1.49 (p=0.07). 23 eyes had EOM weakening surgery, while 18 had combined weakening and strengthening EOM surgery: ∆CH in the weakening group = −1.24 ± 1.77 and ∆CH in combined group = −0.26 ± 1.07 (p=0.04). A nonsignificant difference was found for ∆CRF (p=0.53). Conclusion A different EOM surgery has an early tendency for increase of the postoperative CH specially for muscle weakening procedures (recti recession/inferior oblique muscle weakening).

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“…Pterygium is benign abnormal fibrovascular growth which is commonly found in countries near the equator [1,2]. It originates from bulbar conjunctiva and progresses towards central cornea [1][2][3]. Pterygium can be characterized based on its translucence appearance which gives rise to its morphology.…”

Section: Introductionmentioning

confidence: 99%