Results 1 to 24 of 24

Thread: Fluorescent lighting and reading

  1. #1
    Bad address email on file
    Join Date
    May 2006
    Location
    South
    Occupation
    Dispensing Optician
    Posts
    117

    Fluorescent lighting and reading

    Does anyone have information on reading effects and fluorescent lighting?
    I have been doing a little research on the net just wondering what you all have.

  2. #2
    Manuf. Lens Surface Treatments
    Join Date
    Aug 2002
    Location
    in Naples FL for the Winter months
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    23,240

    Redhot Jumper Eye Starin..................

    Quote Originally Posted by Yvette View Post
    Does anyone have information on reading effects and fluorescent lighting?
    I have been doing a little research on the net just wondering what you all have.

    Ever since fluorescent lighting was introduced in workplaces, there have been complaints about headaches, eye strain and general eye discomfort.

    These complaints have been associated with the light flicker from fluorescent lights. When compared to regular fluorescent lights with magnetic ballasts, the use of high frequency electronic ballasts (20,000 Hz or higher) in fluorescent lights resulted in more than a 50% drop in complaints of eye strain and headaches.

    There tended to be fewer complaints of headaches among workers on higher floors compared to those closer to ground level; that is, workers exposed to more natural light experienced fewer health effects.

    [Wilkins, A. J., Nimmo-Smith, I., Slater, A. & Bedocs, L. (1989). Fluorescent lighting, headaches and eye-strain. Lighting Research and Technology, vol. 21, 11-18]

  3. #3
    Doh! braheem24's Avatar
    Join Date
    Feb 2001
    Location
    KOCF & 89ft ASL
    Occupation
    Other Eyecare-Related Field
    Posts
    3,843
    I have a friend that gets migraines unless she wear her plano pink glasses at work.

  4. #4
    Manuf. Lens Surface Treatments
    Join Date
    Aug 2002
    Location
    in Naples FL for the Winter months
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    23,240

    Redhot Jumper I have a friend that gets migraines...................

    Quote Originally Posted by braheem24 View Post
    I have a friend that gets migraines unless she wear her plano pink glasses at work.
    That is correct.......specially if they work ander daylight tubes that give off the blueish light. Pink is the perfect color.

  5. #5
    Banned
    Join Date
    Jun 2000
    Location
    Only City in the World built over a Volcano
    Occupation
    Dispensing Optician
    Posts
    12,996
    Chris:
    Never tell anyone Pink is the perfect color. We have too many Optiboarders of this political persuasion already!


    However I am sure that you remember B&L's pink and AO's rose which was origionally marketed as a lens to reduce glare off of paper (this was before flouresent lighting was very wide-spread) for proof-readers.

    Chip

  6. #6
    OptiBoard Apprentice
    Join Date
    Mar 2004
    Location
    Minneapolis
    Occupation
    Other Eyecare-Related Field
    Posts
    25
    Years ago I sold fluorescent light bulbs. I remember one study that we used to sell specialty bulbs. This study revealed that the glare caused by standard fluorescent tubes, especially off of white surfaces such as paper, contributed to employee fatigue, lowering late afternoon productivity of office workers. We used this study to promote a specialty fluorescent tube that emitted a greenish tint. The study showed that by switching out the bulbs in offices, late afternoon productivity actually increased --quickly compensating the company for the cost of changing them out. I do realize that some of this is sales hype, but the green tint really did help.

  7. #7
    Master OptiBoarder
    Join Date
    Mar 2008
    Location
    Oakland, California
    Occupation
    Dispensing Optician
    Posts
    1,573
    Quote Originally Posted by chip anderson View Post
    Chris:
    Never tell anyone Pink is the perfect color. We have too many Optiboarders of this political persuasion already!


    However I am sure that you remember B&L's pink and AO's rose which was origionally marketed as a lens to reduce glare off of paper (this was before flouresent lighting was very wide-spread) for proof-readers.

    Chip
    Those were the Cruxite A and AX, AO's version of the original Crookes tints, which I believe were of English origin - these tints were also prescribed for patients with immature cataracts, to provide blue filtration and enhanced contrast
    Last edited by finefocus; 05-22-2008 at 01:27 PM. Reason: thought of something else

  8. #8
    Master OptiBoarder rbaker's Avatar
    Join Date
    May 2000
    Location
    Gold Hill, OR
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    4,401
    Quote Originally Posted by finefocus View Post
    Those were the Cruxite A and AX, AO's version of the original Crookes tints, which I believe were of English origin - these tints were also prescribed for patients with immature cataracts, to provide blue filtration and enhanced contrast
    I have a few Cruxite A and AX in my museum.

  9. #9
    Manuf. Lens Surface Treatments
    Join Date
    Aug 2002
    Location
    in Naples FL for the Winter months
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    23,240

    Redhot Jumper

    Quote Originally Posted by rbaker View Post
    I have a few Cruxite A and AX in my museum.
    Actually there also was a Cruxite B which was slightly brownish.

    The B&L versions where Soft Lite, 1, 2 and 3

  10. #10
    Banned
    Join Date
    Jun 2000
    Location
    Only City in the World built over a Volcano
    Occupation
    Dispensing Optician
    Posts
    12,996
    I think the B&L Version was called Softlite A & B.

  11. #11
    Underemployed Genius Jacqui's Avatar
    Join Date
    Oct 2003
    Location
    Frostbite Falls, Mn.
    Occupation
    Optical Wholesale Lab (other positions)
    Posts
    7,417
    Quote Originally Posted by rbaker View Post
    I have a few Cruxite A and AX in my museum.
    I have a few pairs in a box in the back room, also some AO regular in pink 1 and 2.

  12. #12
    Manuf. Lens Surface Treatments
    Join Date
    Aug 2002
    Location
    in Naples FL for the Winter months
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    23,240

    Redhot Jumper Pink....................

    Actually not a bad idea to sell lenses tinted in the colors for people working under daylight fluorecent light tubes, as they did when the illumination system started to be used.

  13. #13
    Bad address email on file
    Join Date
    Apr 2005
    Location
    Cambridge UK
    Occupation
    Other Eyecare-Related Field
    Posts
    116

    tint prescribing cannot be generic

    There are a number of things to take into account when prescribing for flourescent light difficulties
    1 The emmission curve of the light which can vary wildly (and spike migration makes it more complex)
    2 The flicker frequency and modulation - temporal strobing - separation of pathways is necessary to ensure absolute levels of interpretation
    3 The response of both cone cell and / or ganglion cells - ie colour responses
    4 The relationship between magnocellular systems and parvocellular systems (to some extent dorsal v ventral streams)
    5 Remittance and reflectance - task set - spatial strobing
    6 Metamerism
    7 Luminosity v colour space


    It is totally inappropriate to assume one lens will fit all -to get it right, you have to test a variety of physiological responses - we use specialist instrumentation to achieve this and lenses have to vary from broad spectrum to band or notch filters. If you prescribe inappropriately then there can be significant physiological consequences.
    It is possible to prescribe objectively as well as subjectively - eg EEGs will show significant arousal changes in real time depending on prescribing accuracy.

  14. #14
    Manuf. Lens Surface Treatments
    Join Date
    Aug 2002
    Location
    in Naples FL for the Winter months
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    23,240

    Blue Jumper How would you propose.........................

    Quote Originally Posted by Ian Jordan View Post
    ........................If you prescribe inappropriately then there can be significant physiological consequences.
    It is possible to prescribe objectively as well as subjectively - eg EEGs will show significant arousal changes in real time depending on prescribing accuracy.
    Jordan. ..............I know you are specialized in that field and know more about than all of us together.

    However if one would want to make all the test' you describe above, you would have to go to patients home and place of work to check it all out in order to prescribe them the perfect color filter............which would result in more than one pair of glasses plus a lot of charges for the time spent to check all these different lightning conditions.

    How would you propose a simple optician would handle such complex cases

  15. #15
    Bad address email on file
    Join Date
    Apr 2005
    Location
    Cambridge UK
    Occupation
    Other Eyecare-Related Field
    Posts
    116

    prescribing filters

    We use additive methods to analyse optimum performance as an absolute envelope within the 3D colour space - and in some cases use a vectored version of the Pulfrich effect (a monocular depth modification caused by timing differences) either testsed haploscopically or binocularly.
    - its just not possible to prescribe filters accurately unless you work to absolute levels (we use standardised CIE coordinates), factor in the ambient lighting - yes you do need to Know the lighting, factor in task - and then calculate the optimum lens. Its not necessary to visit workplace except in unusual crcumstances.
    Sorry, currently, virtually all tinted lenses are prescribed using "poke and hope" methods - often this is OK - but it can have major effects on some patients, sometimes very bad. But in other cases properly prescribed tints will literally change peoples lives! A lot more tints will be used in the future - as drug replacements etc. Current prescribing methods will have to change, and the optical / optometric / ophthalmological professions will have a new tool - or significant threat! Tints can be extremely powerful - eventually everyone will have no option but to be profesional, the only question is how long will it take, and how many will get sued.

    The tests we use are optometric (acuity, fields etc), physiological eg vestibular, cognitive eg in prosopagnosia etc, auditory (just finished very ineteresting clinical trial - results will be published in about a year), visual motor integration, AMPs, auto imumne clinical trials due soon, synesthetic tests, variations on the Mc Gurk effect, sequencing and mathematical matching in time and space. We can even assess optimum colour performance objectively.

    It is relatively easy to determine optimum tints - understanding the mechanism is much more complex, but I am happy for anyone visiting Scotland to see methods in practice.

    I will be presenting at optometrists national conference in Anaheim later this year, but only on using visual processing modification methods in special needs such as autism, dyslexia, dyspraxia, dyscalculia etc but would be happy to lecture / discuss privately for those interested in finding out about specialist assesment and prescribing methods in medical, optometric or patients with cognitive problems.

    If you want to meet up contact me through practice website (it has some very interesting and unusual videos) www.jordanseyes.com

    I intend to finalise my travel itinery in about a month

    And the answer is yes - sometimes people do need extra specs, people do need to pay for time and expertise - but the benefits are so great that we have no problem charging. - we work on no win - no fee, and it is very rare that we don't get paid a fee!

    Our patients love coming in too - and I get more chocolates/ cakes/wine as a thank you than you could imagine. Its a pity that I want to lose weight!
    Last edited by Ian Jordan; 06-08-2008 at 07:02 AM.

  16. #16
    Banned
    Join Date
    Jun 2000
    Location
    Only City in the World built over a Volcano
    Occupation
    Dispensing Optician
    Posts
    12,996
    Where do you hide the goards?

  17. #17
    Bad address email on file
    Join Date
    Apr 2005
    Location
    Cambridge UK
    Occupation
    Other Eyecare-Related Field
    Posts
    116

    where do you hide the goards?

    Sorry - don't understand. Is it pidgin English?

  18. #18
    ATO Member HarryChiling's Avatar
    Join Date
    Apr 2005
    Location
    Nowhereville
    Occupation
    Other Eyecare-Related Field
    Posts
    7,765
    Quote Originally Posted by Ian Jordan View Post
    Our patients love coming in too - and I get more chocolates/ cakes/wine as a thank you than you could imagine. Its a pity that I want to lose weight!
    I can help with that, just send them to me. :D I love your site and find what you do very interesting.

    There is a program in the file directory that you might find interesting. http://www.optiboard.com/forums/showthread.php?t=29082 their is a section on spectral analysis, which allows you to look at the CIE charts. I am still readin up on the subject and so far have been enlightened that this area of opticis still poses many challenges and areas for study. Good luck in all your studies and I enjoy checking out your site from time to time.
    1st* HTML5 Tracer Software
    1st Mac Compatible Tracer Software
    1st Linux Compatible Tracer Software

    *Dave at OptiVision has a web based tracer integration package that's awesome.

  19. #19
    Bad address email on file
    Join Date
    Nov 2008
    Location
    Austin
    Occupation
    Frame Manufacturer
    Posts
    3

    Fluorescent Light Sensitivity

    I work for Jonathan Paul Eyewear the makers of Fitovers. We had a lady call in about a month ago asking if we had anything that might help with Fluorescent Light Sensitivity. Honestly I hadn't heard of the ailment but we sent her a couple of Fitovers with our amber and gold lenses. She wrote back that our Gold lenses worked great. If you have any patients with this problem it might be worth checking out. The woman went on to write a lengthy testimonial for us, as she was so pleased with the results.

    More info on our Trilenium Gold lenses by Eagle Eyes can be found on our website:

    http://www.fitovers.com/index.php?page=lensTechnology

  20. #20
    Banned
    Join Date
    Jun 2000
    Location
    Only City in the World built over a Volcano
    Occupation
    Dispensing Optician
    Posts
    12,996
    The best cure for this is the dreaded anti-greenie incandesent bulb, preferably bright enough to see with.

    Chip

  21. #21
    Master OptiBoarder
    Join Date
    Jun 2008
    Location
    Seattle WA
    Occupation
    Optical Wholesale Lab (other positions)
    Posts
    3,137
    Quote Originally Posted by Chris Ryser View Post
    However if one would want to make all the test' you describe above, you would have to go to patients home and place of work to check it all out in order to prescribe them the perfect color filter............which would result in more than one pair of glasses plus a lot of charges for the time spent to check all these different lightning conditions.

    How would you propose a simple optician would handle such complex cases
    There used to be a set of colored lenses sold by Corning that would narrow the color/frequency down. The varied between a pink, orange/red, orange, and yellow/orange to address a few different spectrums of light. But I have not seen a set in many years.

    It was great for Photophobic patients to figure out which tint worked the best for their light conditions.

    Sharpstick

  22. #22
    Master OptiBoarder
    Join Date
    Jun 2008
    Location
    Seattle WA
    Occupation
    Optical Wholesale Lab (other positions)
    Posts
    3,137
    There are flourescent bulbs called "full spectrum" that emit a fuller and flatter color spectrum to mimic daylight that help immensely. They reduce color fatigue.

    All the flourecent studies I could find use the old straight tube flouresent bulbs. In theory the newer twisted tubes could offset some of the "flashing" or pulsing of the older bulbs because although the bulb would still pulse, it would self cancel based on the variable distances of each part of the bulb.

    The old tricks were to bring in some incandesant light to balance the flourescents pulsing, and use a Crux tint to balance the blueish color spectrum.

    Sharpstick

  23. #23
    Manuf. Lens Surface Treatments
    Join Date
    Aug 2002
    Location
    in Naples FL for the Winter months
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    23,240

    Blue Jumper

    This is an old thread back from 1941............. :D :bbg: :angry:

  24. #24
    Master OptiBoarder
    Join Date
    Oct 2004
    Location
    Down in a hole!
    Occupation
    Dispensing Optician
    Posts
    13,078
    Quote Originally Posted by sharpstick777 View Post
    There used to be a set of colored lenses sold by Corning that would narrow the color/frequency down. The varied between a pink, orange/red, orange, and yellow/orange to address a few different spectrums of light. But I have not seen a set in many years.

    It was great for Photophobic patients to figure out which tint worked the best for their light conditions.

    Sharpstick

    CPF by Corning.

    http://www.visionadvantage.net/corningmedicaloptics.htm

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Compact fluorescent bulbs under fire for mercury content
    By rinselberg in forum Just Conversation
    Replies: 0
    Last Post: 03-20-2008, 02:01 AM
  2. What book are you reading?
    By RGC_man in forum Just Conversation
    Replies: 14
    Last Post: 05-19-2005, 08:42 PM
  3. Help reading an RX - what do these #'s mean?
    By ksquared in forum General Optics and Eyecare Discussion Forum
    Replies: 27
    Last Post: 02-26-2005, 03:03 PM
  4. Dispensary Lighting
    By CME4SPECS in forum General Optics and Eyecare Discussion Forum
    Replies: 15
    Last Post: 02-02-2005, 04:07 PM
  5. Reading Test
    By Clive Noble in forum Just Conversation
    Replies: 0
    Last Post: 03-29-2004, 12:59 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •