Which color filter is best for students with visual impairments such as retinal problems?
1707894
There is no research on light filters that I have found. I bought the "white" because it dims the light without color - helps with migraines.
2148688
We placed three types in my Wife's Kindergarten Classroom but I think it would take extensive research to tell exactly how it affects the kids. I purchased the Green, Blue and Multicolored Shades. My Wife liked the effect of the Blue and Green Shades. The magnets on the Blue and Multicolored Shades were weak and I had to purchase more magnets to keep them secure. The Green Shades worked out best all around.
2132023
Go for the one that has the most contrast. It will give you a better and better sight picture.
51586
Greetings. If the color filter is suitable, it will work. But it may be hard to find the right color filter. Thank you.
1740302
Depends on what kind of light it is. If it's an unobstructed view of the sky there should be no lines or banding, with a possible opacity gradient (and supposedly no color temperature shift - that would be a hint of a cheap filter).
1322317
no they are not useful for color blindness in general. they make a difference only for two things 1 finding veins with greater ease and 2 passing the colour blind test. Nothing else. I would not advice they be used for every day vision as they make no significant difference.
1066142
CPL Filter is a Circular Polarizer that increases color saturation (darker blue skies) also eliminates reflections from non metallic surfaces such as water.FLD is a florescent filter for natural colors when shooting under florescent lights.
294208
I use the blue/light blue pair. They were very clear. My kids used the other colors and they never complained, about not seeing well. Hope that helps.
70060
Okay, my student determined that three colors work best for reading text in a book. But only dark blue worked for her with the computer screen. According to articles and researched posted in my Google searches, the variety of colors are there because each student has different color gaps. I hope this helps :-)
2132019
I've gone with green on all of my "colored" sights as it gives my eyes the best contrast inside or outdoors vs red. With this particular sight I use it for indoor target competition.
1076451
I still have the box. I will see if I can find information. http://www.pegasuslighting.com/optivex-uv-filter.html look at this one
1566851
It is translucent and will filter all colors out, except the color it is. However, it should not affect any focal properties.
1049938
I have found that blue and red filters produce a lot of color, using one flash at 8 ft. from subject with a red or blue lens will color the entire scene near monochrome. Yellow and green filters are less distinct and much of the natural color shows. Setting light with these filters to flash on background and lighting the subject in front of the background with lights that don't falling on the background I feel certain would give you color background but I have not tried that specific set up yet.
1169714
Not sure ... i am considered color blind because i cant pass the ishahara test ...but i can see colors just fine , such as traffic lights & rainbows etc. the oxy Iso glasses did not help me at all ...in fact , i made my own glasses with a $ 5.00 pair of lightly tinted glasses from walmart ..popped out the lenses ..put red thin film over the lenses & popped them back in ...with them i can see 19 out of the 24 ishahara plates ...anyway if you want to try the Oxy-Iso glasses they are super easy to return and get a full refund on if they dont work ..which i doubt they will anyway ...hope this helps ...good luck !!! K.T.
2219427
You can use the basic filter set with only a few extra filters. You will need to use a solar filter to look at the sun. Warning: do NOT look through the telescope without it. Blue filter is good for Jupiter, red for mars, yellow for Saturn. For light pollution use a broadband filter. You may want to invest in different eye pieces also.
822768
You had better sit down for this. Adorama , B & H, Calumet all have the filters (glass) and they range from 90 Bux all the way up to 500 Bux.I use the color filters (gelatin) from my old 4 X 5 enlarger, I believe they are Bessler (at least the enlarger is) with it you can mix and match different gels to get the color correction you want.Those cost approx. 50 Bux for an entire set.
1937201
UV filter coating imbues a slight color tinge, and reduces the amount of light. Clear is actually preferable. UV filtering is unnecessary with modern lenses.