The description of shaky vision for a child could mean blurred vision
, double vision
or just about any visual problems that reduces clarity. An eye check up which includes not only a vision check but the evaluation of the eye muscles done by an ophthalmologist is important in his case. For a 6 year old it is often difficult to say if he needs glasses right away so in most cases, an eye drop is instilled in the eyes for a preliminary number and it is confirmed once more a few days later after the effect wears off. The fact that it manifests during sickness or eye strain
means he does have a refractive error
that he masks with the use of the eye muscles and hence manifests during tiredness
of these muscles. To know for sure schedule an eye check up for him as early as possible.