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http://dx.doi.org/10.14479/jkoos.2015.20.2.255

The Purchasing Trends of Purchase of Functional Progressive Addtions Lenses and Correlation Analysis of Binocular Function Value  

Kim, Dong-min (Dept. of Interdisciplinary Program of Biomedical Engineering, Graduate School Chonnam National University)
Lee, Gi-yung (Dept. of Interdisciplinary Program of Biomedical Engineering, Graduate School Chonnam National University)
Park, Hyun-ju (Dept. of Optometry, Dongkang College)
Publication Information
Journal of Korean Ophthalmic Optics Society / v.20, no.2, 2015 , pp. 255-261 More about this Journal
Abstract
Purpose: purchasing status and understanding trends of Functional progressive addtions lenses buyers', Correlation analysis of the Binocular Function value to determine ADD then can be apply sales and prescriptions. Methods: Years 2011 to 2014, 298 patients who were prescribed functional progressive lenses were analysed based on the prescription data and SPSS (Ver. 20.0) was treated using the statistics. Results: Results: The average age of our customers are $27.66{\pm}11.55$ years, average addition power is $+0.73{\pm}0.36D$, customers are using take a prescription of ADD $+0.75{\pm}0.28D$ was the highest 44.33% to 132 people. Near point of convergence of 276 people (92.62%) was mostly less than 10 cm, and near point of accommodation of 134 people (44.97%) was also below 10 cm, within 11~15 cm were 122 people (40.94%). Most of people were within normal range in terms of Near point of convergence and near point of accommodation, near point of accommodation tend to be longer than Near point of convergence. As you can see this result shows most of customers need extra help in their near point of accommodation instead of they are leak at it. FCC (Fused cross cylinder) check Value and ADD (addition power) tests showed that the value of a strong correlation (p=0.00), NPC and NPA were also p=0.001, the correlation of the NPC and ADD is p=0.003, In addition, NPA and ADD also showed a significant correlations (p=0.005). Near Point of Accommodation, negative relative accommodation, and positive relative accommodation are all significantly correlated (p=0.00). The short distance-related variables of the ADD which are NPC, NPA, Age, also appeared to side correlate significantly with each other. Conclusion: Binocular function values of the subjects were highly correlated with each other so precise examination is required. when Age young people are working at short distance, low ADD values was prescribed for solving discomfort. So, in the case of early presbyopia, accommodative insufficiency, or people feel fatigue when they often working at near although their accommodation function is normal, when functional progressive lenses are prescribed, expectation of this should be exactly notified.
Keywords
Functional progressive lenses; Buying trends; Correlations analysis; Accommodation; Asthenopia; Near point of convergence; Near point of accommodation; Relative accommodation;
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Times Cited By KSCI : 6  (Citation Analysis)
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