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Oriental oculopalpebral dimensions: Quantitative comparison between Orientals from Japan and Brazil
Rodrigo U Takahagi1, Silvana A Schellini, Carlos R Padovani
1Department of Ophthalmology, Faculdade de Medicina de Botucatu, Botucatu, Sao Paulo State, Brazil.
Clinical Ophthalmology (Auckland, N.Z.)
|August 12, 2009
Summary
Environmental factors do not significantly alter palpebral dimensions in Japanese descendants (Nikkeis) living in Brazil. Studies show similar measurements between Nikkeis and native Japanese populations.
Area of Science:
- Ophthalmology
- Anthropology
- Genetics
Background:
- Palpebral dimensions are crucial for facial aesthetics and function.
- Understanding ethnic variations can inform clinical practice and research.
Purpose of the Study:
- To quantitatively compare palpebral dimensions between Japanese residents in Japan and Japanese descendants (Nikkeis) in Brazil.
- To investigate the influence of environmental factors on these measurements.
Main Methods:
- Prospective study of 107 Nikkeis (Brazil) and 114 Japanese residents (Japan), aged 20+.
- Digital imaging and Scion Image software used for precise measurements of palpebral fissure.
- Statistical analysis included ANOVA for a three-factor model and multiple comparison tests.
Main Results:
- Overall similar palpebral dimensions observed between Japanese residents and Nikkeis.
- Minor statistical differences noted in specific age groups for interpupillary distance, fissure dimensions, area, and obliquity.
- Native Japanese exhibited slightly larger measurements compared to Nikkeis.
Conclusions:
- Environmental factors do not appear to significantly influence palpebral dimensions in Nikkeis residing in Brazil.
- Genetic factors likely play a more dominant role in determining palpebral morphology.
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