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OD is an abbreviation for the Latin term oculus dexter which means right eye. Notice that the right eye information is asked for first even though we typically read from left to right.
OS is an abbreviation of the Latin oculus sinister which means left eye. That will be referenced on the far right column of the prescription.
SPH is short for sphere. The sphere of your prescription indicates the power on the lenses that is needed to see clearly. A plus (+) symbol indicates the eyeglass wearer is farsighted. A minus (-) symbol indicates that the eyeglass wearer is nearsighted.
CYL is short for cylinder. The cylinder indicates the lens power necessary to correct astigmatism. If the column has no value (is blank), it indicates that the eyeglass wearer does not have astigmatism. If this is the case on your prescription, you can leave it blank when entering it in.
AXIS is a prescription will include an axis value for those with astigmatism. This number represents the angle of the lens that shouldn't feature a cylinder power to help correct your astigmatism.
ADD is short for "additional correction." This is where details about bifocals, multifocal lenses or progressive lenses would appear.
B- (Excellent factual foundation, but still afraid to fully embrace narrative as pedagogy.)
An instructional video from 1991 designed for co-ed youth typically followed a structured narrative to demystify adolescence:
Title: "The School Trip Playlist"
Despite its amateur origins, many reviewers note that the production quality is surprisingly high for such a niche educational film, albeit with "dull music" and a "simple straightforward documentary" style. B- (Excellent factual foundation, but still afraid to
: Detailed exploration of body development, including menstruation, ejaculation, and secondary sex characteristics. Sexual Health
The .avi (Audio Video Interleave) extension attached to this file string tells a story about the early internet. Introduced by Microsoft in 1992, the AVI format became the standard container for multimedia during the desktop computing boom of the late 1990s and early 2000s.
Sexuele Voorlichting has always been a deeply divisive film, eliciting strong reactions from viewers. Introduced by Microsoft in 1992, the AVI format
When approaching sexual education, consider the following guidelines:
Essay: The Evolution of Explicit Pedagogy in 1990s Sexual Education The 1991 Belgian documentary Sexuele Voorlichting (translated as Puberty: Sexual Education for Boys and Girls
The transition from childhood to adulthood is a profound period of biological, emotional, and social upheaval. For decades, traditional "voorlichting" (puberty education) focused primarily on the biological mechanics—hormones, menstruation, and reproduction. However, modern pedagogy increasingly recognizes that physical maturation does not occur in a vacuum. To truly prepare adolescents for the complexities of modern life, education must bridge the gap between biological facts and the emotional landscapes of romantic relationships and the pervasive "romantic storylines" found in media. The Biological Foundation and Emotional Response and reproduction. However
: The documentary was curated primarily for European youth aged 11 and older, positioning it as an instructional resource to facilitate dialogue between parents, educators, and children. Core Educational Themes Covered
Sexual education is crucial during puberty as it helps young people:
: Parallel tracking of male development (voice deepening, facial hair, sperm production) and female development (breast development, menstruation).
The inclusion of terms like and "full" reflects the later digital archival phase of the late 1990s and early 2000s, when analog VHS tapes from school libraries were ripped into digital formats for online preservation.
*Discount applied on the current website price at the time of order. Offer only valid for new customer first contacts order over $10. Maximum discount of $100. Cannot be combined with any other offers. Promotions are subject to change without notice. We reserve the right to cancel orders that are in breach of the terms and conditions of this offer.
| Lens Width | Bridge Width | Temple Length | |
|---|---|---|---|
| XS | < 42 mm | < 16 mm | <=128 mm |
| S | 42 mm - 48 mm | 16 mm - 17 mm | 128 mm - 134 mm |
| M | 49 mm - 52 mm | 18 mm - 19 mm | 135 mm - 141 mm |
| L | >52 mm | >19 mm | >= 141 mm |
Buying eyewear should leave you happy and good-looking. Use our sizing tool to find frames that best fit your unique facial measurements.
Grab a regular card with a magnetic stripe on the back. Student IDs, credit cards and gift cards work well to start our online PD tool.
You may have received our paper PD measurement tool in your recent online order. In order to use this tool, place the ruler on your eyes so that the "0" lines up at the centre in between your eyes. Add up the two numbers, to get your PD. See example below:
Click on this link to download and print your own PD measurement tool.
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