"PL" or "Pl" means "Plano." The easy way to understand this is to just think of "zero" when you encounter it in a glasses prescription or in any other assessment of refractive error and vision. Historically, lens grinders would have a blank piece of glass with...
Excellent question! You should definitely discuss this with your eye doctor well in advance of any surgery. Past vision history and understanding your vision priorities are important in getting you the best results with cataract/lens implant surgery. There simply is no one "best IOL" (IntraOcular Lens). Furthermore, noIOL can reproduce the...
Well, not everybody does! Cataract surgery is the replacement of the clouded, natural lens of the eye with an artificial intraocular lens (IOL), or "lens implant." Despite the tremendous advances in ophthalmic technology, there is still no IOL that has been developed that can successfully reproduce the...
It depends on what you mean by "20/20 vision." Many people mistakenly think 20/20 refers to both reading and far vision when it is actually just distance. You also need to specify "corrected (by glasses) 20/20" or "uncorrected 20/20" after the cataract is replaced with a lens...
There are two conventions used among eye doctors on how to notate a typical glasses prescription: minus cylinder or plus cylinder. They are functionally the same (at least at the level of accuracy required in spectacle lenses). In effect, it depends on whether you measure from...
Not really. A "color" is what we call a categorization within our conditioned brain of a particular combination of not just wavelength, but saturation and hue. Color is not really "out there." But the different wavelengths of light are really "out there."Am I just playing...
It's a 19th Century myth that humans' sense of sight and smell is weak compared to the rest of the animal kingdom. The thing that probably stops most predators from killing us, over the course of our evolutionary history, is that we see them before they...
This is a very common question eye doctors are asked. The number ratio "20/20 or 20/40 etc." is a measurement of visual acuity. If your visual acuity is not 20/20, it can be from pathology (like cataract) or it can be from what we call "refractive error" e.g. nearsightedness, astigmatism, farsightedness -which are not...
This is a very common question eye doctors are asked. The number ratio "20/20 or 20/40 etc." is a measurement of visual acuity. If your visual acuity is not 20/20, it can be from pathology (like cataract) or it can be from what we call "refractive error" e.g. nearsightedness, astigmatism, farsightedness -which are not...
This is a very common question eye doctors are asked. The number ratio "20/20 or 20/40 etc." is a measurement of visual acuity. If your visual acuity is not 20/20, it can be from pathology (like cataract) or it can be from what we call "refractive error" e.g. nearsightedness, astigmatism, farsightedness -which are not...