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A LONGITUDINAL STUDY OF THE AGE DEPENDENCE OF HUMAN OCULAR REFRACTION—II. PREDICTION OF FUTURE TRENDS IN MEDIUM AND HIGH MYOPIA BY MEANS OF CLUSTER ANALYSIS
Author(s) -
Saunders Harold
Publication year - 1986
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1986.tb01140.x
Subject(s) - refraction , cluster (spacecraft) , longitudinal sample , sample (material) , term (time) , population , regression analysis , medium term , optometry , longitudinal data , regression , demography , statistics , physics , optics , medicine , mathematics , psychology , computer science , developmental psychology , macroeconomics , quantum mechanics , sociology , economics , thermodynamics , programming language
— A sample population of myopes with an initial correction of 2 DS or more is extracted from the longitudinal sample of ametropes reported by Saunders (1986). The myopes are partitioned by means of cluster analysis and, as a result, three distinct groups of myopes are identified. The time/regression equations which best describe the groups are stated. It is concluded that meaningful long‐term prognosis of medium and high myopes is unlikely and that reasonable prediction of short‐term trends requires at least two consecutive refraction data to determine the group allocation of a myope.