it is not likely to be related to his myopia. but it is not a "problem", either. having larger pupils than other children is like having larger
earsEar barotrauma
Ear discharge
Ear emergencies
Ear examination
Ear tube insertion
Ear tube insertion - series than other children. it usually doesnt mean anything. as long as no eye doc has ever said anything about it to you, then he is likely fine. all patients get pupil testing at every exam, and believe me they'd tell you if there was a problem.
so: larger pupil size than his siblings. no big deal.