Impact of laser refractive surgery on ocular alignment in myopic patients

Chung, Seung Ah; Kim, W K; Moon, Jong Wook; Yang, Hyun Seung; Kim, J K; Lee, S B; Lee, J B

doi:10.1038/eye.2014.209

Cited by 8 publications

(10 citation statements)

References 28 publications

(55 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chung et al. () concluded that changes in ocular alignment can occur in myopic subjects as a result of refractive surgery, the likelihood being higher in those cases where there already was a significant level of anisometropia or phoria/tropia before surgery. Similar conclusions were drawn by Mandava et al.…”

Section: Resultsmentioning

confidence: 99%

“…Hashemi et al (2013) found an increase in both the near point of accommodation and the near point of convergence 3 months after PRK in normal young myopic subjects, thus, highlighting the importance of a proper presurgical evaluation of both accommodation and convergence capabilities. Chung et al (2014) concluded that changes in ocular alignment can occur in myopic subjects as a result of refractive surgery, the likelihood being higher in those cases where there already was a significant level of anisometropia or phoria/tropia before surgery. Similar conclusions were drawn by Mandava et al (1996), Yildirim et al (2003) and Snir et al (2003); they agreed that postoperative binocular problems are more likely to occur if binocular problems were already present before refractive surgery.…”

Section: Corneal Refractive Surgerymentioning

confidence: 99%

“…Likewise, there is a wide range of parameters available to clinicians to diagnose non-strabismic binocular dysfunctions, but the most accurate ones are near point of convergence and binocular accommodative facility (Cacho-Martinez et al 2013). Besides, several studies have highlighted the importance of measuring positive and negative fusional vergences and the near point of convergence before refractive surgery, especially in cases with large-angle heterophoria or heterotropia (> 8Dp) (Kowal et al 2005;Holmes et al 2011;Chung et al 2014).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Binocular vision alterations after refractive and cataract surgery: a review

García-Montero

Diego

Garzón

et al. 2018

Acta Ophthalmologica

View full text Add to dashboard Cite

To review binocular and accommodative disorders documented after corneal or intraocular refractive surgery, in normal healthy prepresbyopic patients. A bibliographic revision was performed; it included works published before 1st July 2017 where accommodation and/or binocularity was assessed following any type of refractive surgical procedure. The search in Pubmed yielded 1273 papers, 95 of which fulfilled the inclusion criteria. Few publications reporting binocular vision and/or accommodative changes after refractive surgery in normal subjects were found. The reduction in fusional vergence is the most frequently reported alteration. Anisometropia is an important risk factor for postoperative binocular vision-related complaints. Most diplopia-related visual complaints, irrespective of the surgical procedure, were in fact misdiagnosed preoperative disorders. The preoperative evaluation of patients seeking spectacle/contact lens independence should include a complete binocular and accommodation assessment where parameters such as the phoric posture, accommodative amplitude and facility, near point of convergence, fusional reserves and accommodative convergence/accommodation coefficient are measured. This would allow the identification of risk factors that could compromise the success of the refractive surgery and cause clinical symptoms.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Corneal Refractive Surgerymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Binocular vision alterations after refractive and cataract surgery: a review

García-Montero

Diego

Garzón

et al. 2018

Acta Ophthalmologica

View full text Add to dashboard Cite

show abstract

“…As the quality of accommodation effort improves with adjustment to the new emmetropic state, the amount of convergence probably increases [12]. Chung et al found more than half of their patients with exodeviation preoperatively had an improvement postoperatively [13]. Nemet et al and Rajavi et al also observed a decreased amount of exotropia after two anisometropia patients with exotropia performed LASIK [14,15].…”

Section: (Fig 2)mentioning

confidence: 99%

Near binocular visual function after SMILE surgery for myopia

Chen

Wang

2020

Preprint

View full text Add to dashboard Cite

KEYWORDSNear heterophoria; Near point convergence; Small incision lenticule extraction (SMILE); Visual fatigue 2 Abstract Purpose: To analyze the changes of near binocular vision function after small incision lenticule extraction and association with asthenopia. Methods: This was a retrospective study Twenty-five myopic patients who underwent small incision lenticular extraction (SMILE) surgery from Tianjin Eye Hospital were included in this study The values of parameters of near binocular vision function were measured at preoperative, 1 week, 1 month and 3 months postoperatively including near heterophoria, near point convergence (NPC), horizontal base-in fusional reserves (BIFR) and base-out fusional reserves (BOFR). The patients were grouped by the preoperative symptoms scores. The comparisons among different follow-up periods were conducted by the repeated measures analysis of variance. The Pearson correlation coefficient (r) was used to evaluate the linear fit of the relationship between variables. Multiple linear regressions were used to analyze the relationship between asthenopia and parameters of binocular and accommodative function. Results: The NPC significantly increased at 1 week and 1 month after SMILE and then get back to the level of preoperatively in 3 months postoperatively. Near heterophoria significantly decreased at 1 week after SMILE and then remained stable in 3 months postoperatively. In the regression analysis, there was no significant association between the values of the fatigue questionnaire at different stages after SMILE operation and the parameters of near binocular visual function (P>0.05). However, there was significant positive correlation among each visit with the preoperative visual fatigue questionnaire P<0.05).There was no significant difference in the parameters of binocular visual function between the normal group and the fatigue group. For the visual fatigue group, there was positive correlation between the score of visual fatigue questionnaire 1 week after SMILE surgery and the difference in near horizontal phoria between 1w postoperative and that preoperative (r=0.523, P=0.046), and significant negative correlation with the recovery point of BOFR at 1 week (r=-0.581, P=0.023). Conclusion: SMILE surgery wouldn't influence the binocular vision in the short term. Since there was no significant association between binocular vision function and visual fatigue, factors of asthenopia in the early period of SMILE surgery should be further studied. Background Declarations Ethics approval and consent to participateThis study was approved by the Ethics Committee of Tianjin Eye Hospital and adhered to the tenets of the Declaration of Helsinki. Written informed consent to use any clinical data for analysis and publication was obtained from all patients prior to surgery.

show abstract

“…In 2014 Han reported an increase in the fusional vergence at near following refractive surgery [3]. Chung (2014) underlines the risk of a change in the ocular alignment, particulary in cases with a large-angle heterophoria/ heterotropia [4].…”

Section: Introductionmentioning

confidence: 99%

Study of the Orthoptic Assessment in Refractive Eye Surgery

Sabetti¹,

Ciancaglini²,

Guetti³

et al. 2020

OJOph

View full text Add to dashboard Cite

Purpose: The aim of our study was to assess the variations in fusion and stereopsis before and after refractive surgery. Methods: We conducted a retrospective study. 140 patients (78 M, 62 F) were selected, aged 20 -59 years (mean age 36 ± 10 DS). All patients received a comprehensive ophtalmological and orthoptic examination. Surgery was performed using a MEL-80 excimer laser (Carl Zeiss Meditec, Jena, Germany). Results. Fusional convergence amplitudes after refractive eye surgery range from at near 18 -20 PD in 42 (30%) patients; 25 -30 PD in 56 (40%) patients; 35 -40 PD in 42 (30%) patients, at far 20 -25 PD in 84 (60%) patients; 30 -40 PD in 56 (40%) patients, fusional divergence at near after refractive eye surgery range from at near 6 -8 PD in 108 (75.7%) patients; 10 -12 PD in 52 (37.1%), at far 6 -8 PD in 126 (90%) patients; 10 -12 PD in 14 (10%) patients. None of the patients developed any ocular deviations. NCP, on average, decreases from 9.4 ± 1.5 cm to 9.1 ± 0.9 cm after. None of these patients with a normal NCP before surgery developed an abnormal NCP after refractive surgery. Eighteen patients (12.8%) had a stereopsis higher than 60 s of arch before surgical intervention. Of these, in 2 cases (2.8%) stereopsis increased from 200 to 40 s of arch after surgery. In the rest of patients stereopsis remained unchanged. Conclusion: The increase in fusion at near appears to be considerably interesting, whereas there is no worsening of stereopsis. A careful pre-surgery orthoptic evaluation is extremely revelant for a safe refractive surgery, this reducing the risk of complications associated with fusion and stereopsis.

show abstract

Impact of laser refractive surgery on ocular alignment in myopic patients

Cited by 8 publications

References 28 publications

Binocular vision alterations after refractive and cataract surgery: a review

Binocular vision alterations after refractive and cataract surgery: a review

Near binocular visual function after SMILE surgery for myopia

Study of the Orthoptic Assessment in Refractive Eye Surgery

Contact Info

Product

Resources

About