PREVALENCE OF CORNEAL STRIAE IN PATIENTS USING LOTRAFILCON B CONTACT LENSES FOR 6 MONTHS (EN-US)
Sergey Cusato Jr
http://www.pentavisionevents.com
miopia, myopia, study, lotrafilcon, contact lenses, lentes de contato, cornea, corneal striae
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Conteúdo do artigo

Introduction

Subsequent stromal striae are always a challenge for eye care specialists, since this sign may be of great help to them. The term is used to describe the lines observed in the stroma of the cornea due to different pathologies.

Deep furrows arise as a result of trauma (puncture wounds); intraocular surgery (striated keratitis); degenerative changes of collagen (Keratoconus); in idiopathic diabetes and disturbances of the cornea (Murray and Perriguin) (Montague, 1987).

In the posterior cornea, most cases are secondary to edema caused by extended use of contact lenses with low DK / T and high water content, when edema is 4 to 6% is reversible once the lens is removed, but when it exceeds 8%, the striae are formed due to increased collagen fibers (Efron, 2005).

In this sense, it aims to raise awareness regarding the importance of primary care in the cornea, because as optometrists, contact lenses are prescribed daily, however, in doing so, many are unaware of the fact that the lenses can generate in the patient's cornea.

Therefore, it is important to raise awareness, as a prevention mechanism in relation to changes in the corneal physiology because when detected in time can be controlled.

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Stromal striae and folds. Fountain.
Modified Efron, 2005. 


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Stromal striae 
Cusato, 2015

Methods

DESIGN: Cross-sectional, observational study.

PARTICIPANTS: 20 patients, male and female aged between 18 and 50 years, were selected who met the inclusion criteria.

INCLUSION CRITERIA: Patients without systemic diseases. Patients without ocular disease. Patients between 18 to 50 years. Patients who have not used contact lenses.

EXCLUSION CRITERIA: Patients with corneal injury or alteration level. The examination of patients first present one Schirmer less than 10 mm and less than 10 seconds BUT. Patients who did not sign the informed consent.

STUDY VARIABLES: socio-demographic variables: Age; gender; and clinical variables: Refraction; stretch marks.

STATISTICAL ANALYSIS: was performed using frequency tables for univariate and bivariate analysis of the study variables.

Results

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Conclusion

The interpretation of this study does not pretend to be exhausting, but that binds in an overview, for understanding the prevalence of posterior corneal striae in patients using contact lenses significantly interfering with quality of vision, because the corneal striae that arise due to thinning and stretching of the cornea and spread.

From the results of this study, it can be concluded that the male had a higher proportion in the study in relation to the female gender. In relation to age, the age group most frequently ranged from 15-44 years. As for the refractive diagnosis, higher proportion was myopia.

Of the study population, corneal striae were found in 75% of the sample. If 75% is take like 100% of population with striae of that 75%, only 73% were in the age group between 15 to 44 years; 60% were female. Similarly, who they presented triae, 80% had myopia, with 86% of the population with Schirmer 10 to 20 mm and a BUT 10 to 14 seconds.

References

AMERICAN ACADEMY OF OPHTHALMOLOGY. (1991). Ophthalmic procedures assessment: corneal endothelial photography. Ophthalmology, v. 98, p. 641468.

BATES, A. K.; HIORNS, R. W.; CHENG, H. (1992). Modelling of changes in the corneal endothelium after cataract surgery and penetrating keratoplasty. British Journal of Ophthalmology, v. 76, p. 32-35.

 

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