Comparing Refractive and Scheimpflug-image Based Parameters between Right and Left Eyes and between Dominant and Non-dominant Eyes Related to Handedness
Noémi Tóth
Department of Ophthalmology, University of Debrecen, Debrecen, Hungary.
Adrienne Csutak
Department of Ophthalmology, University of Debrecen, Debrecen, Hungary.
Ziad Hassan
Orbi-Dent Refractive Surgery and Medical Center, Debrecen, Hungary.
Eszter Deák
Department of Ophthalmology, University of Debrecen, Debrecen, Hungary.
Laszlo Modis Jr.
Department of Ophthalmology, University of Debrecen, Debrecen, Hungary.
Gabor Nemeth *
Department of Ophthalmology, Borsod-Abaúj-Zemplén County Central Hospital and University Teaching Hospital, Miskolc, Hungary.
*Author to whom correspondence should be addressed.
Abstract
Aim: Our aim was to compare refractive and anatomical parameters between right and left eyes and between the dominant and non-dominant eyes of right- and left-handed patients.
Study Design: Clinical observational study.
Methodology: Refractometry, optical biometry and Scheimpflug photography were performed in 163, healthy subjects (138 right-handed, 25 left-handed). A hole-in-the-card test was used to determine sighting dominance. The parameters were compared in three groups: differences between the right and left eyes; differences between the dominant and non-dominant eyes; differences between the right-dominant and left-dominant eyes.
Results: The mean age of the patients was 46.42±20.60 years. Among the right-handed patients, 77 were right-eye dominant and 61 were left-eye dominant. Significant differences were found regarding all observed parameters, excluding refraction data between the right and left eyes of the right-handed patients. Regarding dominant vs. non-dominant eyes of right-handed patients, only some data showed statistically significant differences. We could not find any significant differences in parameters of the left-handed group.
Conclusions: Significant differences were found in Scheimpflug-derived anatomical parameters of the left and right eyes of right-handed persons. However, when comparing the dominant and non-dominant eyes, our results show only isolated differences. Sighthing dominance plays a role in ophthalmology, but this is probably not related to anatomical differences.
Keywords: Cornea, hand dominance, Scheimpflug imaging, sighthing dominance.