- #Under cylinder on my glasses script it just says sph. for free
- #Under cylinder on my glasses script it just says sph. plus
This is for correcting eye misalignments (strabismus) and reducing double vision. My patients will have a number in this column.
#Under cylinder on my glasses script it just says sph. plus
Add power is always a plus number and it can range from as low as +0.75 to +4.00 (in rare cases), though the normal add powers are between +1.25-+3.00. If you wear bifocals or progressive glasses, then there will be a number in this column. You probably know the signs if you fall into this age group – reading, using your phone, all starts to get a little harder and you have to hold things far away for them to be clear. Presbyopia is the condition which affects most individuals over the age of 40. This number is also measured in Diopters and refers to the extra magnifying power needed to help you see up close if you are presbyopic. Do they still use protractors in high school? Probably not, I bet there’s some app for that now. Remember high school geometry? That’s what the axis refers to, just like your old protractor. If your prescription doesn’t have a cylinder number, then it won’t have an axis number either. If you don’t have a number in this column, it means you don’t have any astigmatism.Īxis refers to the direction or position in which the cylindrical lens is pointed to correct the astigmatism. In our office, all our prescriptions are written using minus cylinder. This number can be minus or plus, but practices tend to stick to one sign. For people with astigmatism, it means that images are slightly stretched horizontally or vertically, like a fun house mirror. Astigmatism just means the front of your eye, or the cornea, is shaped more like an egg or football, instead of being perfectly spherical like a ball. It’s almost as if it’s a terrible disease (which it’s not). Sometimes new patients come to me and say, “I have….ASTIGMATISM” (que the scary music). Cylindrical lenses are used for correcting astigmatism. There are two types of lenses in glasses prescriptions – sphere and cylinder. This patient is a child and her eye is a little shorter than is normal, so light comes to focus behind the retina.Ī plus spherical lens, or convex lens, helps focus the light onto the retina. As their eyeball elongates, they outgrow this farsightedness – but, their vision is never affected by it because their eye is so flexible it’s able to focus past the farsightedness, giving them 20/20 vision. Though, that’s not entirely accurate – most kids are hyperopic. That means this person can see far away, but not up close (that’s only for adults). Here’s another prescription with a plus number in the sphere column, meaning this patient is hyperopic, or farsighted. This patient’s eye is a little longer than normal, so the light focuses in front of the retina instead of on it.Ī minus spherical lens, or a concave lens, helps focus it onto the retina. Whether the number is plus or minus, the higher the number, the stronger the prescription. In this example, this patient has a minus in front of the number because he is myopic or nearsighted. The number is the amount, measured in diopters, needed to correct nearsightedness or farsightedness. This refers to the spherical lens necessary to sharpen your vision to 20/20 (if possible for you). OS stands for oculus sinister, for left eye and OU stands for oculus unitas or both eyes OD stands for oculus dextrous, for those of you who took Latin in high school, which means right eye. It’s like an ancient language – what does it all mean? OD, OS, Sphere, Cylinder, Axis, Add?įirst, OD and OS. So, you did it – finished the dreaded “1 or 2” test and your doctor hands you a prescription.
#Under cylinder on my glasses script it just says sph. for free
And, most optical shops (like ours) can always redo the lenses for free for three months if you end up getting the glasses and they just don’t seem to work for you, even after giving them a couple weeks. Your glasses prescription is individualized to suit your needs. And, the thing is there is no wrong answer. Everyone gets so nervous when we ask “Better 1 or 2”. Refraction is the term used to describe that process of fine tuning your glasses prescription when you sit behind the phoropter. The picture was taken at the Children’s Discovery Center, our equipment in our office is much newer than this! Even though my husband and I are ophthalmologists (eye surgeons), we still do a large number of glasses and contact lens prescriptions.Ībove my son, Taj performing his first refraction with the phoropter when he was 1.5 years old. This is probably one of the most common questions I get.
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