Myopia Research - Treatment, Prevention, Causes, Correction

Myopia Research Today is a free monthly online journal that collates and summarizes the latest research about Myopia, including details on treatment, prevention, causes, correction.


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Gas injection versus vitrectomy with gas for treating retinal detachment owing to macular hole in high myopes.

Li X, Wang W, Tang S, Zhao J

Department of Ophthalmology, People's Hospital, Peking University, Beijing, China. drlixiaoxin@yahoo.com.cn

OBJECTIVE: To compare the efficacy between intravitreal gas injection alone and pars plana vitrectomy (PPV) with intraocular gas tamponade in treating retinal detachment due to macular hole in high myopes. DESIGN: Prospective, randomized controlled, multicenter study. PARTICIPANTS: We included 231 eyes of 231 patients with retinal detachment owing to myopic macular hole from 14 study sites in China. INTERVENTION: The patients were randomly assigned to undergo intravitreal perfluoropropane (C3F8) gas injection (group A) or vitrectomy with intraocular C3F8 gas tamponade (group B). MAIN OUTCOME MEASURES: Complete ocular examination included best-corrected visual acuity, applanation tonometry, slit-lamp biomicroscopy, color fundus photography, ultrasound examination, and optical coherence tomography at baseline and every 3 months after the surgery. RESULTS: At 12 months after surgery, the retinal reattachment rates was 59.8% (52 eyes) in group A, which was significantly lower than group B (79 eyes, 74.5%; P = 0.029). Logistic regression showed that PPV (P<0.001) and low height of retinal detachment at baseline (P = 0.068) were associated with a greater retinal reattachment rate. Subgroup analysis revealed that in group B, concomitant internal limiting membrane (ILM) peeling showed a slightly higher anatomic success rate (79.2%) than no ILM peeling (70.0%). The postoperative best-corrected visual acuity of the eyes with attached retina between group A and B was not significantly different (P>0.05). CONCLUSIONS: Pars plana vitrectomy with C3F8 endotamponade resulted in a higher anatomic success rate than intravitreal C3F8 gas injection alone in treating retinal detachment owing to macular hole in high myopes. FINANCIAL DISCLOSURE(S): The authors have no proprietary or commercial interest in any materials discussed in the article.

Published 2 June 2009 in Ophthalmology, 116(6): 1182-87.e1.
Full-text of this article is available online (may require subscription).


Articles on Myopia published 2 June 2009:

A prospective, contralateral eye study comparing thin-flap LASIK (sub-Bowman keratomileusis) with photorefractive keratectomy.   Ophthalmology, 116(6): 1075-82.

PURPOSE: To determine the differences in the visual results, pain response, biomechanical effect, quality of vision, and higher-order aberrations, among other parameters, in eyes undergoing either photorefractive keratectomy (PRK) or thin-flap LASIK/sub-Bowman keratomileusis (SBK; intended flap thickness of +/-100 microm and 8.5-mm diameter) at 1, 3, and 6 months after surgery. DESIGN: A contralateral eye pilot study. PARTICIPANTS: Fifty patients (100 eyes) were enrolled at 2 sites. METHODS: ... [Abstract] [Full-text]

Pachymetric ratio no-history method for intraocular lens power adjustment after excimer laser refractive surgery.   Ophthalmology, 116(6): 1057-66.

OBJECTIVE: To evaluate a new pachymetric method not requiring pre-refractive surgical data for adjusting the intraocular lens (IOL) power in eyes undergoing cataract surgery after excimer laser refractive surgery and comparing final refractive results with previously published formulas or methods. DESIGN: Retrospective noncomparative case series. PARTICIPANTS: Thirty-six eyes from 23 patients who had uneventful phacoemulsification cataract surgery after previous myopic (35) or mixed astigmatism ... [Abstract] [Full-text]


Articles on Myopia published 27 May 2009:

The impact of corrected and uncorrected refractive error on visual functioning: the Singapore Malay Eye Study.   Invest Ophthalmol Vis Sci, 50(6): 2614-20.

PURPOSE: To determine the impact of corrected and uncorrected myopia and hyperopia on visual functioning in an urban Malay population. METHODS: The Singapore Malay Eye Study is a population-based, cross-sectional study of Singaporean Malays aged 40 to 80 years. Myopia was defined as spherical equivalence (SE) <or= -0.50 D, hyperopia as SE > 1.0 D, and emmetropia as SE -0.5 to 1.0 D in the better eye. Uncorrected myopia and hyperopia were defined as at least a 2-line difference between ... [Abstract] [Full-text]

Fundus autofluorescence in subfoveal choroidal neovascularisation secondary to Pathological Myopia.   Br J Ophthalmol, 93(6): 771-4.

AIM: To describe the fundus autofluorescence (FAF) characteristics of choroidal neovascularisation (CNV) associated with pathological myopia (PM), and their modification after photodynamic therapy (PDT). DESIGN: Open-label, prospective, interventional case series. METHODS: Forty-two patients affected by subfoveal CNV in PM underwent PDT with a 24-month follow-up. Each patient underwent an ophthalmological examination every 3 months, including FAF and fluorescein angiography. FAF distribution ... [Abstract] [Full-text]

Myopia and polymorphisms in genes for matrix metalloproteinases.   Invest Ophthalmol Vis Sci, 50(6): 2632-6.

PURPOSE: To investigate the relation between myopia and variations in three genes coding for matrix metalloproteinases, enzymes that degrade matrix proteins and modulate scleral extensibility. METHODS: Three hundred sixty-six men and women, from Sheffield, United Kingdom, were genotyped for the 1G/2G polymorphism in the MMP-1 gene, the 5A/6A polymorphism in the MMP-3 gene and the Arg-->Gln polymorphism in exon 6 of the MMP-9 gene and assessed for refractive error. RESULTS: Risk of myopia was ... [Abstract] [Full-text]

Lens thickness changes among schoolchildren in Taiwan.   Invest Ophthalmol Vis Sci, 50(6): 2637-44.

PURPOSE: To explore the possible influence of ocular growth, refractive error and age on the crystalline lens in school-age children. METHODS: A Taiwan nationwide survey of myopia performed in 2006 was used to determine the prevalence and severity of myopia and the changes in ocular components. A total of 11,656 students were enrolled, including 5,390 boys and 6,266 girls, with ages ranging from 7 to 18 years. Refractive status was measured with an autorefractometer with the subject under ... [Abstract] [Full-text]


Articles on Myopia published 25 May 2009:

Thresholds for interface haze formation after thin-flap femtosecond laser in situ keratomileusis for myopia.   Am J Ophthalmol, 147(6): 966-72, 972.e1.

PURPOSE: To evaluate the risk factors for interface haze formation after thin-flap femtosecond laser--laser in situ keratomileusis (LASIK). DESIGN: Prospective case series. METHODS: One hundred and ninety-nine consecutive eyes that underwent femtosecond laser LASIK with a LADAR 4000 excimer laser (Alcon Laboratories, Fort Worth, Texas, USA), were analyzed from January 1 to April 30, 2008. Treated eyes were divided into 2 groups according to desired flap thickness: 90 microm (106 eyes), and 100 ... [Abstract] [Full-text]

Refractive lens exchange with foldable toric intraocular lens.   Am J Ophthalmol, 147(6): 990-6, 996.e1.

PURPOSE: To assess visual and refractive outcomes, and rotational stability after refractive lens exchange (RLE) with toric intraocular lens (IOL) implantation to correct ametropia and preexisting astigmatism. DESIGN: Prospective, nonrandomized, observational case series (self-controlled). METHODS: This prospective, nonrandomized, and self-controlled study included 32 eyes of 19 consecutive patients with more than 1.00 diopter (D) of preexisting corneal astigmatism having RLE with AcrySof Toric ... [Abstract] [Full-text]


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Myopia Research Today Archive:

Volume 1 (2004)
  Issue 1 (November)
  Issue 2 (December)

Volume 2 (2005)
  Issue 1 (January)
  Issue 2 (February)
  Issue 3 (March)
  Issue 4 (April)
  Issue 5 (May)
  Issue 6 (June)
  Issue 7 (July)
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Volume 3 (2006)
  Issue 1 (January)
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  Issue 3 (March)
  Issue 4 (April)
  Issue 5 (May)
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  Issue 7 (July)
  Issue 8 (August)
  Issue 9 (September)
  Issue 10 (October)
  Issue 11 (November)
  Issue 12 (December)

Volume 4 (2007)
  Issue 1 (January)
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  Issue 4 (April)
  Issue 5 (May)
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  Issue 7 (July)
  Issue 8 (August)
  Issue 9 (September)
  Issue 10 (October)
  Issue 11 (November)
  Issue 12 (December)

Volume 5 (2008)
  Issue 1 (January)
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  Issue 3 (March)
  Issue 4 (April)
  Issue 5 (May)
  Issue 6 (June)
  Issue 7 (July)
  Issue 8 (August)
  Issue 9 (September)
  Issue 10 (October)
  Issue 11 (November)
  Issue 12 (December)

Volume 6 (2009)
  Issue 1 (January)
  Issue 2 (February)
  Issue 3 (March)
  Issue 4 (April)
  Issue 5 (May)
  Issue 6 (June)



Myopia Books

Marketing Myopia (Harvard Business Review Classics) (Harvard Business Review Classics)

Marketing Myopia (Harvard Business Review Classics) (Harvard Business Review Classics)