Considering that 1/f is the power of a lens, it might be witnessed the powers of slender lenses in touch are additive. An ideal slender lens with two surfaces of equal curvature would have zero optical energy, which means that it could neither converge nor diverge light. All actual https://finnyfint.pointblog.net/5-essential-elements-for-콘택트렌즈-종류-62910213