HomeArticlesEye Astigmatism Explained Eye Astigmatism Explained By Joseph Donaldson February 26, 2020 Articles, Blog 1 Comment So You’ve had your eyes examined and you got your glasses prescription, which looks a little bit like this, but what happens if you’ve been told that you’ve got astigmatism and your prescription looks more like this? If you’ve never had astigmatism explained to you or you’re still confused… then in this video I’m gonna make sure that astigmatism explained in a way that makes sense. I’m Martin Oguzie and this is Martin’s Eye Tips, thank you for joining me. On this channel we’re all about bringing you eye care tips, how-to videos and product reviews all designed to help you see better, more comfortably and to be less anxious about your eyes so if that sounds interesting to you then please think about subscribing to the channel and also hit that notifications bell so you get notified every time I release a new video. So let’s get started with today’s video which is all about astigmatism. So in this video; in order for astigmatism to be explained we’re going to talk about three key areas, first of all what is astigmatism, secondly how does astigmatism affect your vision and thirdly how we prescribe for astigmatism. So I want to start today with my a Peace Of Mind Point and that is to say that my astigmatism is not a disease and, that’s an important thing for you to beware of because often I see people when they’re first introduced of term astigmatism they concern whether it is a condition that has sight threatening implications or whether it means that there’s something more serious going on with their sight and with their vision an actual fact it’s a very common condition and a cause for us to say that most people have some degree of astigmatism it’s my experience more unusual to find somebody who has just a completely spherical eye and prescription with no astigmatism whatsoever so it’s definitely not a disease and definitely not something you have to panic about so what is astigmatism now to explain that I’m going to be referring at point to a glasses prescription report so if at any point you want to understand a bit more about how your glasses prescription works then please refer to the link up there and that will take you to a video that I made previously my stigmatism is much like nearsightedness and farsightedness in that it’s an error in the curvature of the front of your eye the cornea which means that the cornea which is that first surface on your eye that your breast the contact lens on it now has two different curvatures a steeper curvature and a flatter curvature compared to an eye that doesn’t have a stigmatism where all the curvatures are of equal power so rather than being a spherical in shape like half of a beach ball might be instead because of this difference in curvature at the front of the eye on the cornea then the eye has more of a shape like a rugby ball unless basically astigmatism explained in its simplest form the result of this difference in curvature in two directions is that your eye instead of having one a uniform focus point at the back of the eye it now has two focus points at the back of the eye now because in astigmatism we have these two different focus points this is what causes the problems in vision that we associate with astigmatism now it’s also worth mentioning that you can get farsightedness and astigmatism in combination as well as nearsightedness and astigmatism in combination or you can get astigmatism on its own as well so how does astigmatism affect your vision now many people say that it can cause blurriness of your vision but in actual fact the key thing with astigmatism is that it causes distortion and this distortion comes about because of these two focus points that you have and the further away they are the bigger astigmatism is and the more distorted things will look to you as well so on the keyways astigmatism affects your vision is that it distorts straight lines and this can make texts quite difficult to see so if you’re trying to do read a number plate or if you are doing intricate reading in bed for example then it could make it difficult to tell one letter from another based on where your astigmatism lines up with the lines on the letters so this can cause that confusion have between letters so other than things just look in blurry astigmatism can bring about distortion which can make fine detail more difficult. So how do we prescribe lenses for astigmatism so the best way to explain this is by having a look at a copy of somebody’s prescription so that I would know astigmatism would only require one power that is the same in all directions on the curvature of the eye on the cornea and that’s why when you look at your prescription you’d have a prescription that looks something like this with simply one number in the sphere box and that number then could be a plus or minus depending on whether you’re far or near sighted the sill and the axis boxes would then remain empty now the eye with astigmatism requires more information and more detail in order to achieve the right lenses to correct the vision and bring best clarity and sharpness and that’s why when we have a look at the prescription of somebody with the stigmatism we now require information in the sill box which stands for cylinder and the axis and these two numbers go hand-in-hand you can think of the cylinder number as a power or a strength of your astigmatism where as the axis is a measurement in degrees to inform us about where we want to put that curvature difference so when we correct astigmatism we need to add the additional power called the cylinder power or the sill on top of any sphere that we might have now so we don’t end up having a combined power of the sphere and the cylinder that is correcting equal strength in all directions who wouldn’t actually deal with the curvature difference we then need an axis the cylinder has an axis which is a direction along which there is zero cylinder power so that when we combine this cylinder and a sphere then along the zero power only the power of the sphere comes through that way we’ve got a lens that now has the cylinder power in one direction only and also the combination of whatever’s in the cylinder and in the sphere in the other direction and that’s how we deal with a stigmatism now every eye is different and as a result where the axis needs to be on your eye is different it’s never always in the same place for everybody so for some people it may be at 90 degrees others it may be along and in fact it could be any number between 0 and 180 degrees now glasses aren’t the only way to be able to correct astigmatism of course you’ve also got the option of contact lenses and we have specially made contact lenses that deal with the curvature differences on the eye as well and these lenses are called Turkic contact lenses so laser correction is also another option for people with astigmatism so it doesn’t rule you out too like you used to back in the early days of laser so in fact you can actually get quite high levels of astigmatism corrected with a laser correction now so and I think powers up to about six diopters can be a corrected and that’s pretty high given that most people will be comfortably under about four so that’s essentially the key things that you should know about astigmatism so for my tip of the day if you’re somebody who doesn’t know whether you’ve got astigmatism but you’ve got a copy of your prescription then I suggest you pull that out and have a look at that prescription because that will tell you whether you have a stigmatism or not so have a look for a number in the SIL box and a number in the axis as well so if you have numbers in those two boxes then yes you have astigmatism if it’s a small amount of astigmatism it may be 0.25 minus 0.25 sometimes it can be plus as well if it’s a large amount of astigmatism then it will be a number significantly higher than that today’s question for you is do you have astigmatism and if you do what strength is it leave me a message in the comment section below let me know what strength your astigmatism is and that might be a number that is a minus 1 – 2 – 3 whatever it may be, leave a message down there and I’ll have a look at that if you want to know more about your glasses prescription then please check out my video over here and if you want to find out more about whether you need glasses or not then please have a look at the playlist listed over here as well until my next video take care Tags:and, astigma, astigmatism, Astigmatism Explained, astigmatism lasik, astigmatism symptoms, blurred vision, blurry vision, Contact lenses, contact lenses and astigmatism, Corneal Astigmatism, do i need glasses, eyeball shape, farsightedness, glasses and astigmatism, how astigmatism is measured, Martin Oguzie, myopia, myopia and astigmatism, nearsightedness, ophthalmologist, optometrist, Stigmatism, that, the, Toric contacts, vision loss, What is astigmatism, what is stigmatism Related Posts Ophthalmology – Red Eye: By Stephanie Baxter M.D. Stroke Therapy at Helen Hayes Hospital for Impaired Vision What Is Keratoconus? About Author admin One Comment Martin Oguzie January 18, 2020 Q: Do you have astigmatism and what strength is it? Reply Add a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment:*Name:* Email Address:* Save my name, email, and website in this browser for the next time I comment.