OO Terms to Know By All4Eyes December 2007

Table of contents:

Optical terms we use

Terms we made up to describe ourselves and our observations

Philiac terms” which apply to some of us

I. Optical terms we use:

-0.25 to -2.75, mild/low myopia, people with this degree of myopia can generally manage fairly well without correction, except for tasks such as driving, blackboard reading and movie watching which require sharp distance vision; these people can often be observed squinting while performing these tasks uncorrected, glasses for this degree of myopia are concave in back with a slight convex curve in front.

-3.00 to -5.75, moderate myopia, people with this degree of myopia typically wear correction full-time and consider themselves dependant on it, they are still able to read and perform close-work uncorrected but things like navigation, picking up visual cues for social interaction and at the higher end of this category, even intermediate-distance tasks like computer work are difficult; a fairly continuous squint is often present when bare-eyed, glasses for this degree of myopia are concave in back with a slight convex curve in front.

-6.00 to -9.75, severe/high myopia, people with this degree of myopia have great difficulty performing any visual work uncorrected, even reading is challenging, this is the level where many myopes stop squinting because it no longer makes any significant improvement; this is also the beginning of high myopia and persons in this category run a greater risk of retinal tears and/or detachments than the non- or mildly myopic, glasses for this degree of myopia are usually concave in back with a plano-front.

-10.00 on up, very severe/high myopia, people with this degree of myopia are functionally blind without correction, the range of clear vision is limited to a couple inches in front of the person’s eyes, very high myopes have an even greater risk of retinal complications than lesser high myopes and many very high myopes can‘t achieve 20/20 even with correction, due to thin retinas and/or the minification of the glasses themselves (in this case, the vision is better with contacts) (although many very high myopes do see well with their glasses and never experience retinal problems), glasses for this degree of myopia are usually either biconcave or (for extreme cases) myodisc.

+0.25 to +2.75, low/mild hyperopia, people with this degree of hyperopia can usually manage fairly well uncorrected, except for reading and other close-work (if the low hyperope is young with good accommodation, even close vision may be clear, though he/she likely will experience some eyestrain), squinting can be helpful for mild hyperopes as it is for mild myopes, but is less characteristic of hyperopia.

+3.00 to +5.75, moderate hyperopia, people with this degree almost certainly need glasses to read, even if young and typically experience some distance problems as well, unless their accommodation is very good.

+6.00 to +9.75, severe/high hyperopia, close-work uncorrected is out of the question and distance vision is almost as bad as it is for a myope of corresponding degree (up until this point, hyperopes tend to be less glasses-dependant than their myopic counterparts, due to good distance vision and the ability to obtain good close vision by focusing effort, but at the severe levels, myopes tend to do better, since at least they can see what’s right in front of their eyes, while nothing can be far away enough to be in focus for a high hyperope).

+10 and up, very severe/high hyperopia, people with this degree of hyperopia are functionally blind without correction and while they don’t have the retinal complications or minification problems of high myopes, they often have problems related to the distorted view of things through strong plus lenses, including peripheral vision problems (though, like myopes with minification troubles, these hyperopes often see better with contacts, which cause less distortion), also, it seems that very high hyperopia is even rarer than very high myopia and many of the cases that exist are due to surgical removal of the internal lenses, so there are even fewer “natural” very high hyperopes, glasses for this degree of hyperopia are sometimes made in a lenticular lens design, like myodiscs for very high myopia, except in this case the center “bowl” is a super-strong plus lens.

OD -4.50 OS -4.00 (this is my rx, I have 4 and a half diopters of myopia in my right eye and 4 diopters of myopia in my left, it only has one set of numbers because I have no astigmatism)

OD +3.25 -.75 axis 105 OS +2.50 -1.00 axis 84 (this person has 3 diopters of hyperopia and three-quarters of a diopter of astigmatism in their right eye and 2 and a half D of hyperopia and 1 D of astigmatism in the left eye

OD -7.00 +.50 axis 68 OS -7.00 +1.50 axis 71 Add +2 (this person has 7 D of myopia in both eyes with half a diopter of astigmatism right and 1 and a half D astigmatism left (written in plus terms since this person got their rx from an ophthalmologist instead of an optometrist) and needs either a bifocal segment or a pair of reading glasses with a power of -5 (-7 + +2= -5)

OD -3.00 -.75 axis 52 Prism 5D BO OS +4.25 -.50 axis 56 Prism 5D BO (this person is myopic in their right eye and hyperopic in their left (yes, this is possible, though not common) with a bit of astigmatism in both and some base-out prism correction for crossed-eyes)

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II. Terms we made up to describe ourselves and our observations:

8-( frowning with glasses

:: ) smiling with glasses (:: means 4 eyes)

:; ) winking through glasses

8;) pushing glasses up to forehead then winking

(((o)))--(((o))) small eyes behind strong minus glasses with power rings

|-), squinting without glasses, though this would probably more likely be |-(

:|-( or 8|-( squinting WITH (too weak) glasses

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III. Philiac terms” which apply to some of us:

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