This information is for the benefit of everyone who uses binoculars. Whoever has confirmed information or a correct addition, please enlighten us. May God reward you all. * If the binoculars have a central focus wheel: Adjust the left eye first with the central wheel, then adjust the right eye by turning the diopter on the right eye itself. And the advantage of the central diopter when moving from a near target to a distant target (or vice versa) is enough to move only the central wheel. * As for binoculars where each eye has an independent focus, it is easier to adjust, but every time you move from a near target to a distant one or vice versa, you need to readjust each eye anew. If you start by adjusting the right eye before the left eye in binoculars with a central wheel, you may feel that the vision is unbalanced or as if the binoculars are "cross-eyed", while the reason is often the adjustment method. For communication, WhatsApp ( Phone number appears when clicking the contact button )