Difference between revisions of Close-up glasses
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[[File:Microsoft Cloud Event Dublin, upclose with graphs.jpg|thumb|Without '' | [[File:Microsoft Cloud Event Dublin, upclose with graphs.jpg|thumb|Without ''close-up glasses'', you're on the path to ever increasing prescriptions and will get nowhere with vision improvement :(]] | ||
'''Close-up glasses''' (''computer glasses'', ''differentials'', ''diffs'') are reduced strength glasses or lenses for [[close-up|close up activity]]. They have a lower correction than your [[reduced]] lenses, the difference between them being usually between 1 and 2 [[diopters]].<ref>{{cite jake|https://endmyopia.org/faq-items/what-is-the-differential-prescription/|What is the differential prescription?}}</ref><ref name=ChooseReduction>{{cite jake|https://endmyopia.org/choose-reduced-glasses-prescription-differential-close-friendly-glasses/|How To Choose A Reduced Glasses Prescription (Differential / Close-Up Friendly Glasses)}}</ref> | '''Close-up glasses''' (''computer glasses'', ''differentials'', ''diffs'') are reduced strength glasses or lenses for [[close-up|close up activity]]. They have a lower correction than your [[reduced]] lenses, the difference between them being usually between 1 and 2 [[diopters]].<ref>{{cite jake|https://endmyopia.org/faq-items/what-is-the-differential-prescription/|What is the differential prescription?}}</ref><ref name=ChooseReduction>{{cite jake|https://endmyopia.org/choose-reduced-glasses-prescription-differential-close-friendly-glasses/|How To Choose A Reduced Glasses Prescription (Differential / Close-Up Friendly Glasses)}}</ref> | ||
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Standard EM advice is to wear differentials when looking at static focal planes (e.g. 2D planes like screens, books) at fixed distances for extended periods of time. The main activities EM warns against include screen work, media consumption, and checking phone notifications. It is okay to wear normalized in other contexts, such as when eating a meal, or looking at your conversation partners. It is also permitted to wear differentials in other close-up contexts based on personal preference, but there is no need to overdo normalized/differential glasses changes. (for example, there is no need to swap to differentials whenever someone walks up to you for a conversation) | Standard EM advice is to wear differentials when looking at static focal planes (e.g. 2D planes like screens, books) at fixed distances for extended periods of time. The main activities EM warns against include screen work, media consumption, and checking phone notifications. It is okay to wear normalized in other contexts, such as when eating a meal, or looking at your conversation partners. It is also permitted to wear differentials in other close-up contexts based on personal preference, but there is no need to overdo normalized/differential glasses changes. (for example, there is no need to swap to differentials whenever someone walks up to you for a conversation) | ||
To determine if a close up activity is hurting your vision with the glasses you are using (differentials or normalized), it helps to have a point of comparison (like a line on a | To determine if a close up activity is hurting your vision with the glasses you are using (differentials or normalized), it helps to have a point of comparison (like a line on a Snellen chart), and to compare against that reference point before and after the activity in question. | ||
''' Example scenarios for differentials ''' | ''' Example scenarios for differentials ''' | ||