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Paper Information

Journal:   BINA   SPRING 2011 , Volume 16 , Number 3 (64); Page(s) 210 To 219.
 
Paper: 

EVALUATION OF REFRACTIVE STATE IN PATIENTS WITH UNILATERAL CONGENITAL NASOLACRIMAL DUCT OBSTRUCTION

 
 
Author(s):  BAGHERI A.*, SAFAPOOR S., FERDOSI A.A.
 
* OPHTHALMIC RESEARCH CENTER, SHAHID BEHESHTI UNIVERSITY OF MEDICAL SCIENCES, TEHRAN, IRAN
 
Abstract: 
Purpose: To evaluate refractive state in patients with unilateral congenital nasolacrimal duct obstruction.
Methods: In this descriptive prospective study, patients with unilateral congenital nasolacrimal duct obstruction scheduled for surgery were enrolled over a period of two years (2007-2009). Cycloplegic refractive error in both eyes was measured under anesthesia before surgery (probing, silicon intubation or dacryocystorhinostomy). When more than one procedure was required, only the first refraction was considered for analysis.
Anisometropia greater than 0.5 diopter was defined as clinically significant.
Results: Ninety-four patients with mean age of 25.4±20.4 months (range: 6 month to 10 years) entered the study. In older ages the prevalence of clinical signs secondary to nasolacrimal obstruction such as discharge and epiphora increased, however, this was not statistically significant (r=0.115 & P=0.270). Spherical equivalent refractive error in 78(83%), 8(8.5%) and 8(8.5%) affected eyes was hyperopic, myopic and emmetropic, respectively.
Corresponding figures in unaffected eyes were 67(71.3%), 22(2304%) and 5(5.3%), respectively. The prevalence of anisometropia greater than 0.5 D was 25% and that of less than 0.5 D was 43%. Anisometripia was not present in 32% of patients. Each month increase in patient's age was associated with 0.007 D higher difference in spherical refractive error between two eyes (P=0.019). For cylindrical refractive error, this change was negative and non-significant (P=0.291) and for spherical equivalent it was positive but non-significant (P=0.137). In older ages, more surgeries were needed (r=0.297, P=0.004).
Conclusion: Anisometropia increase with age and more time is necessary to relieve the obstruction during surgery. Anisometropia specially anisohyperopia in older subjects becomes more common and also difficult to treat. Early refraction and intervention help to prevent amblyopia and may reverse the anisometropia.
 
Keyword(s): REFRACTIVE ERRORS, CONGENITAL, NASOLACRIMAL DUCT OBSTRUCTION
 
 
References: 
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Citations: 
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+ Click to Cite.
APA: Copy

BAGHERI, A., & SAFAPOOR, S., & FERDOSI, A. (2011). EVALUATION OF REFRACTIVE STATE IN PATIENTS WITH UNILATERAL CONGENITAL NASOLACRIMAL DUCT OBSTRUCTION. BINA, 16(3 (64)), 210-219. https://www.sid.ir/en/journal/ViewPaper.aspx?id=277068



Vancouver: Copy

BAGHERI A., SAFAPOOR S., FERDOSI A.A.. EVALUATION OF REFRACTIVE STATE IN PATIENTS WITH UNILATERAL CONGENITAL NASOLACRIMAL DUCT OBSTRUCTION. BINA. 2011 [cited 2021June24];16(3 (64)):210-219. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=277068



IEEE: Copy

BAGHERI, A., SAFAPOOR, S., FERDOSI, A., 2011. EVALUATION OF REFRACTIVE STATE IN PATIENTS WITH UNILATERAL CONGENITAL NASOLACRIMAL DUCT OBSTRUCTION. BINA, [online] 16(3 (64)), pp.210-219. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=277068.



 
 
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