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  2. Wratten number - Wikipedia

    en.wikipedia.org/wiki/Wratten_number

    1.31 / 3 ⁠ Cooling filter to increase the color temperature slightly. The opposite of 81A. Results in mired shift of -21. [9]: 38 82B pale blue: 1.4 ⁠ 2 / 3 ⁠ Cooling filter, slightly stronger than 82A and opposite of 81B. Can also be used when shooting tungsten type B film (3200 K) with household 100 W electric bulbs (2900 K).

  3. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    For example, in the Los Angeles Police Department's radio procedures, Code 1 is not a response code, and its meaning is transferred to Code 2, the original meaning of which is transferred to the semi-official response code "Code 2-High". Additionally, some agencies use "Code 99" which means for all units to respond, typically used in bomb ...

  4. List of optometric abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_optometric...

    AC 3/4: Grade 3 anterior chamber angle: AC 2/4: Grade 2 anterior chamber angle: AC 1/4: Grade 1 anterior chamber angle: AC 0/4: Grade 0 anterior chamber angle: closed angle between cornea and iris AC/A: Accommodative convergence / Accommodation ratio the portion of the range of convergence that occurs in response to accommodation: Acc ...

  5. What 'secret' loudspeaker codes mean at department stores - AOL

    www.aol.com/news/2010-10-13-what-secret...

    This "code" is one of many innocuous sounding secret codes that. If you've been shopping in a big box retail store you've probably heard an announcement on the loudspeaker such as, "code yellow ...

  6. Eyeglass prescription - Wikipedia

    en.wikipedia.org/wiki/Eyeglass_prescription

    A prescription of −1.00 +0.25 × 180 describes a lens that has a horizontal power of −1.00 D and a vertical power of −0.75 D. Only ophthalmologists write prescriptions in + cylinder. An optometrist would write a prescription in - (minus) cylinder. All spectacle and contact lenses would be made in minus cylinder.

  7. Template : Unicode chart Variation Selectors Supplement

    en.wikipedia.org/wiki/Template:Unicode_chart...

    vs 90 vs 91 vs 92 vs 93 vs 94 vs 95 vs 96: u+e015x vs 97 vs 98 vs 99 vs 100 vs 101 vs 102 vs 103 vs 104 vs 105 vs 106 vs 107 vs 108 vs 109 vs 110 vs 111 vs 112: u+e016x vs 113 vs 114 vs 115 vs 116 vs 117 vs 118 vs 119 vs 120 vs 121 vs 122 vs 123 vs 124 vs 125 vs 126 vs 127

  8. Doctors Say This Viral "Sleep Rule" Actually Works - AOL

    www.aol.com/doctors-viral-sleep-rule-actually...

    How to follow the 10-3-2-1-0 sleep rule 10 hours before bed: No more caffeine. While there’s some variation in the genetics of how different people process caffeine, 10 hours is a reasonable gap ...

  9. Eye chart - Wikipedia

    en.wikipedia.org/wiki/Eye_chart

    An example of the Landolt C eye chart (also known as the Japanese eye chart.). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]