Published: 25 May 2017 at 10:00
Study into the eyesight of twins shows power of genetics down to the tiniest detail
Optical aberrations in healthy people are caused by genetics rather than environmental or lifestyle factors, according to research by Anglia Ruskin University published in the journal Investigative Ophthalmology and Visual Science.
Researchers discovered the results after examining the vision of 69 sets of twins, 36 of whom are identical twins. The study looked at optical defects found in every eye which slightly alter a person’s vision.
The results of the study showed that identical twins shared identical defects, even in the over-50s where environmental factors may have normally influenced these aberrations through more than half a century.
Non-identical twins, who only share 50% of genes on average, had different ocular defects as a consequence of their genetic difference, compared to identical twins (who share 100% of genes).
The author of the study, Dr Juan Tabernero of Anglia Ruskin University’s Vision and Eye Research Unit (VERU), said:
The research was carried out with the Laboratorio de Optica and the Murcia Twin Registry from the University of Murcia, Spain.