движениям глаз vergence vergence English vergence Wikipedia vergence angled vergence angled vergence ophthalmology ophthalmology Wikipedia English English vergence vergence English Vergence vergence Nikon Monarch Binoculars Vergence vergence vergence VERGENCIAS vergence Vergence English vergence English English vergence vergence vergence vergence Vergence vergence Leupold binoculars English vergence angled vergence