Ruma Purkait1. 1. Department of Anthropology, Dr. H. S. Gour Central University, Saugor, 470 003, MP, India. r.purkait@gmail.com
Abstract
BACKGROUND: The aim of the study was to follow the growth dynamics of ocular dimensions from birth to 18 years of age. The norms of dimensions at different ages, peak growth period, and maturity age of the dimensions are essential information for a physician in delineating syndromes or in deciding the optimal time for undertaking surgery to correct an abnormality. Lack of a comprehensive study in India has prompted us to undertake our own. METHODS: A total of 1,960 healthy subjects from central India were included in the study. An anthropometric technique was used to measure medial (MICD) and lateral intercanthal distances (LICD), palpebral fissure length (PFL), and derived interpupillary distance (IPD). Two indices incorporating medial intercanthal distance with bizygomatic width (BZW) and maximum head breadth (HB) were derived. RESULTS: During infancy the growth rate of ocular dimensions range from 13 to 23 % in males and from 17 to 30 % in females. After infancy the growth rate falls below average in all dimensions except MICD. MICD matures at 9 and 11 years in females and males, respectively. The other dimensions follow in 2-3 years time. The indices MICD-HB and MICD-BZW vary between 20-22 and 24-25, respectively, during the normal growth period. Outside the range delineates a syndrome or abnormality. CONCLUSIONS: The present study has generated metric norms for all growing ages and also the growth dynamics for ocular dimensions of healthy Indian subjects. The knowledge will be useful to physicians as a guideline in correcting ocular deformity. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
BACKGROUND: The aim of the study was to follow the growth dynamics of ocular dimensions from birth to 18 years of age. The norms of dimensions at different ages, peak growth period, and maturity age of the dimensions are essential information for a physician in delineating syndromes or in deciding the optimal time for undertaking surgery to correct an abnormality. Lack of a comprehensive study in India has prompted us to undertake our own. METHODS: A total of 1,960 healthy subjects from central India were included in the study. An anthropometric technique was used to measure medial (MICD) and lateral intercanthal distances (LICD), palpebral fissure length (PFL), and derived interpupillary distance (IPD). Two indices incorporating medial intercanthal distance with bizygomatic width (BZW) and maximum head breadth (HB) were derived. RESULTS: During infancy the growth rate of ocular dimensions range from 13 to 23 % in males and from 17 to 30 % in females. After infancy the growth rate falls below average in all dimensions except MICD. MICD matures at 9 and 11 years in females and males, respectively. The other dimensions follow in 2-3 years time. The indices MICD-HB and MICD-BZW vary between 20-22 and 24-25, respectively, during the normal growth period. Outside the range delineates a syndrome or abnormality. CONCLUSIONS: The present study has generated metric norms for all growing ages and also the growth dynamics for ocular dimensions of healthy Indian subjects. The knowledge will be useful to physicians as a guideline in correcting ocular deformity. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
Authors: Vaidehi S Dedania; Jerry Y Liu; Dana Schlegel; Chris A Andrews; Kari Branham; Naheed W Khan; David C Musch; John R Heckenlively; K Thiran Jayasundera Journal: Ophthalmic Genet Date: 2017-07-13 Impact factor: 1.803