I have always admired that eidetic memory that some have, or some would call, a photographic memory. I do not have that. My mind is more conceptual, and even perhaps intuitive. I reach conclusions based

The dioptrimetar is optical instrument used by optometrists and opticians. It shows what dioptry is in lens: sphere, cylinder, axis, add, and in some cases, prism. Usually when people come to control vision