Can a person with -6.75 strength contact lenses wear -6.50 or -7.00?
I know this is more of a question for my optometrist, but I live in a small town, and he's aaaaaaaaaalways busy. So I figured I'd come here first, hoping someone would know. Right now I wear 02 optix by cibavision, and so far those are the only ones I can find that have a -6.75 strength. I was hoping to order something a little different this time. I wanted to try the Freshlook Colorblends, made also by cibavision, but they don't seem to make them in -6.75.
Is -3.50 much stronger than -3.00 when it comes to contact lens strength?
yes a -3.50 is stronger than a -3.00. meaning that you became slightly more nearsighted. the difference in strength should be the same in specs and cl's. your rx should stabilize between the age of 18-21. please come back and select best answer!
Is my eyesight really bad -3.00 is my contact lenses strength?
lol. bad is like anything close to -9.00 that's pretty much blind. you're eyesight is okay... not that great but another reason that the eye doctor might say it's bad is that during teenage years, it increases very rapidly hard contacts can hinder this but you'll have to talk to your doctor about it... also it's sorta painful and irritating the first few times you wear them but you'll get used to them) if it makes you feel better, my eyesight is -2.75 for both eyes but i have really bad astigmatism (-1.75) so that pretty much makes my eyesight something like -4.25 or -4.50
What strength lens, in diopters, should be prescribed to correct this vision problem?
A farsighted person has a near point of 45 cm rather than the normal 25 cm . What strength lens, in diopters, should be prescribed to correct this vision problem? Pg=__________D Thanks for any suggestions!
Why should I buy a 50mm lens when I can set my 18-55mm lens to 50mm?
The 50mm will almost certainly be a faster lens (wider maximum aperture), which means it can give you usable shots in lower light. It has no zoom range, but still maintains creative option in another direction as it can give you a shallower depth of field. It is also sharper for the same aperture, giving technically better images. It may focus faster as it often requires less movment internally to get focus, and is nearly always smaller and more compact.SoIt will give you more options in low light conditions.It gives you creative options via depth of focus.It is often the cheapest lens you can buy to get the sharpest photos from your camera. A zoom kit lens is never the sharpest lens, and almost never gives you the sharpest output your camera is capable of.Another cool but more subjective reason is that it limits your options to a fixed 50mm, which will force you to think more about your composition. This makes you learn photography quicker.Another more subtle reason is video; If video is your thing, the wider apertures that are neccessary for creating the ‘cinematic look’ (which often has a shallow depth of field to extract the main subject from the clutter of the background) will not be available from your kit lens, but are there in a 50mm prime. Additionally, the cinematic look has a far softer look generally (sharp footage looks like video rather than cinematic), and you need f2.8 or less to achieve it well. To be fair though, you usually go wider than 50mm for video (I tend to stick between 12–35mm for APS-C/super-35 crop, and 8–24mm for m43/super-16 crop).Worth noting that in the old days, most cameras came with a 50mm lens as the kit lens, and you can always get a cheap 50mm f1.7 (‘nifty fifty’) for most mounts, and this is the ideal choice for the beginner to get the most out their camera with respect to sharpness, but at the lowest upgrade cost as they move away from the limitations of the typical kit-lens.I should note that most kit lenses are of the form 16–50mm, f3.5-f5.6, and are not the best. Some cameras come with good kit lenses (e.g. the Sony Alpha A77 comes with a good 16–50mm f2.8, and some Panasonic cameras come with a very decent pancake lens primes). If you have something like that, you may well be happy with the kit lens as it allows your camera to output photos at its maximum sensor quality.
Should I get the ultra-thin high index lenses from Warby Parker? Why?
Hi-index lenses are worth considering depending on your Rx as well as the amount of decentration of the lenses in the frame you choose. High index lenses are thinner than regular plastic and are available in different levels of thinness. Every lens material has pros and cons. With any high index lens material, an anti-reflection coating is recommended. I personally don’t care much for polycarbonate because it has a poor abbe or clarity factor. For the difference in price, I like 1.60 plastic best overall and when indicated, 1.67 or 1.74. Mid-index is not an option I offer to patients unless they need safety lenses or lenses with good drilling and grooving properties and that choice is Trivex. In a nutshell, high index lenses are thinner and should be anti-reflection coated. Typical anti-reflection coatings today should include a hard-coating as well as an easy-clean topcoat. Other features may be included.
Can my contact lense be stronger then glasses?
They are 'stronger' if your prescription is indeed -2.50 and -2.25 and you live in North America, your eye doctor will most likely prescribe an issue so you can purchase the right prescription for your contact lens. If not, I, personally, my prescription is -6.50 and I use -6.50 for my contact lens. Think of it real simple, glasses, with their hard lens, we can't put in directly on our eyeball as we can with contact lens, so yeah. Your contact lens are indeed 'stronger' than normal prescription glasses.
Switching from stronger to weaker power contact lenses?
I currently wear a -2.75 contact lense strength. I can't afford to buy new lenses (almost out of lenses to wear) nor do I have health insurance. I did happen to find a box in my house that are a -2.50. They have not expired. Is it going to be damaging to my eye to switch to a weaker power by 0.25??
If my eyesight is -0.75, can I use a -1.00 contact lens instead of a -0.75?
You can but would be better off with a -0.5 because when do you really need to read fine print 4 meters away? Being a little under corrected for myopia rarely causes issues like eye strain but being over corrected does, especially when reading. This is less of an issue if you are young (20s or less) but becomes irritating towards the end of the day. Disclaimer this answer is for informational purposes only and should not be considered as professional medical advice. Please consult a medical professional for your health care needs.