The location and laterality of pterygia have been found to be related to the level of fixation of an eye.
A new study published in this month's issue of Eye looked at over 400 patients with the common conjunctival lesion.
In patients with normal vision, pterygia had a greater prevalence in the dominant eye, while for those with amblyopia or abnormal retinal correspondence, pterygia tended to be unilateral in the better fixating eye and unilateral in the amblyopic or suppressing eye.
The authors concluded that fixation had an important role in determining the nature of pterygia.
The lesion is known to be related to the exposure of surface tissue to ultraviolet light.
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