As per the description of your symptoms, this seems to be more vision related problem and perhaps could be due to some changes in the eye vision. Firstly you should consult with your eye specialist doctor so that your vision can be checked. As for the cyst
in the left testicle, the treatment would depend on the severity of its symptoms and would either require a conservative or a surgical approach for treatment. This can be determined after consultation with the urologist
specialist. Hope this will help. Regards.