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==Positive vs. Negative Cylinder== | ==Positive vs. Negative Cylinder== | ||
Eyecare professionals have individual preferences for writing out positive vs negative values for cyl. For discussion with other | Eyecare professionals have individual preferences for writing out positive vs negative values for cyl. For discussion with other [[reduced lens method]] participants, it is usually recommended to convert positive cylinder values into their negative equivalent, as the negative cylinder values are potentially more intuitive from a reduction point of view. | ||
* For example, there are participants who get surprised [https://www.youtube.com/watch?v=AJQEdXwKiNA&t=1363s when they remove plus cylinder, and then find that the glasses they order are too strong]. | * For example, there are participants who get surprised [https://www.youtube.com/watch?v=AJQEdXwKiNA&t=1363s when they remove plus cylinder, and then find that the glasses they order are too strong]. | ||