Special Sunglasses
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I've always used Mile High "Aviate" sunnies and they've been great:
Go Soaring / Products / Sunglasses
They were already pretty cheap I thought, but now I see they're on special!
Go Soaring / Products / Sunglasses
They were already pretty cheap I thought, but now I see they're on special!
Transition (or other auto tintng lenses) dont get dark enough for glare in flight and hardly tint at all when driving a car or flying a high wing. They dont do the job.
I have prescription sunnies and prescription ordinary glasses. It's the way to go.
The DAME handbook (Para 2.1.13) talks about the desireable tint.
I have prescription sunnies and prescription ordinary glasses. It's the way to go.
The DAME handbook (Para 2.1.13) talks about the desireable tint.
Sunglass lenses should protect the eyes from glare while not adversely affecting the visual cues necessary for safe flight. Accordingly, lenses should not be too dark, and should transmit at least 15% of incident light. The tint used should be "neutral density" (N.D.), that is, a greyish tint that does not distort colour perception or adversely affect red signal detection and recognition. The recommended tint is N.D.15.
I have ND15 in my sunnies. Excellent.
Last edited by bentleg; 22nd May 2012 at 10:51.
Join Date: Apr 2008
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+1 prescribed sunnies
+1 ND15....ask for it by name! if they stare at you blankly go somewhere else.
I run my sunnies @ 75% tint, ND15 and they are gold! I am highly light sensitive, so its not unusual to find me driving around with them on when others have their headlights on.
Transitions lenses have their uses, but i found a stable tint to be more usefull. My dad often complains his transitions are never dark enough. (he drives trucks)
If you need a prescription, then forget being a tightarse and buying clip ons unless they are ND15 compliant....cost of a decent pair of those is less than buying precribed sunnies.
I love my prescribed dark goggles and hate my clears.
+1 ND15....ask for it by name! if they stare at you blankly go somewhere else.
I run my sunnies @ 75% tint, ND15 and they are gold! I am highly light sensitive, so its not unusual to find me driving around with them on when others have their headlights on.
Transitions lenses have their uses, but i found a stable tint to be more usefull. My dad often complains his transitions are never dark enough. (he drives trucks)
If you need a prescription, then forget being a tightarse and buying clip ons unless they are ND15 compliant....cost of a decent pair of those is less than buying precribed sunnies.
I love my prescribed dark goggles and hate my clears.
Join Date: Nov 2000
Location: Melbourne,Vic,Australia
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With prescription glasses the internet is your friend. Bifocal tinted glasses at $40 (depending on frames), Crowds like zenni produce stuff that is just as good as the expensive stuff (I have access to suitable test equipment)
None of those photochromatic lenses(including Serengeti) provide the degree of light attenuation required for flight, particularly at high altitude.
Right now, we seem to have a significant proportion of the present generation of pilots doing long term damage to their eyesight, by no longer knowing that something that works at ground level, doesn't fit the bill at altitude.
Right now, we seem to have a significant proportion of the present generation of pilots doing long term damage to their eyesight, by no longer knowing that something that works at ground level, doesn't fit the bill at altitude.
Light attenuation? They attenuate more light than regular-non tinted lenses in many cases, so are perfectly fine for night use, and as far as UV attenuation goes, they also block 100% of UVA and UVB. The aircraft I fly has perspex side windows so it allows enough of the UV through to activate the tint on transitions properly. (Although the tint is unrelated to the UV filtering.)
I tend to only use them at night and go with the contact lens / sunglass combination the majority of the time during the day, but the times I have used them for flying I find that they are much more suited to it than what they are to driving, i.e. the tint levels always seem to be just right. (The car windows block too much UV for them to be useful.)
Crowds like zenni produce stuff that is just as good as the expensive stuff (I have access to suitable test equipment)
From a post like that, I can only conclude you are dumb, as well as deaf. Do you even know what the recommended specifications are, and why, for testing?
Do your nice cheap frames have retainers so that a lens cannot be displaced (either into your eye, or fall on the floor at a time determined by Murphie's Law) short of dismantling the frames.
Got the specs. for impact resistance, have you?? For the recommended grade of polycarbonate --- not all polycarbonate lenses are the same?? Got the correct focal length for the lens maker??
Glekichi,
I can't add much more to my previous posts, but the general run of posts on this thread (and previous threads on the same subject) only serve to illustrate the general level of ignorance about sight preservation and eye health, some very specific to pilots, amongst pilots.
A bit of searching around, and contacting Martin X Hogan will help.
With some of the posters it seems, as always, there seems to be a determination to remain willfully ignorant --- potential candidates for the annual aviation Darwin awards.
Tootle pip!!
PS: One of many starting points, but does not cover the recommended design of either frames of lenses for aviation use.
<http://www.pilotfriend.com/aeromed/medical/vision_and_flying.htm>
Last edited by LeadSled; 23rd May 2012 at 02:16.
Join Date: Nov 2000
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Do your nice cheap frames have retainers so that a lens cannot be displaced (either into your eye, or fall on the floor at a time determined by Murphie's Law) short of dismantling the frames.
Got the specs. for impact resistance, have you?? For the recommended grade of polycarbonate --- not all polycarbonate lenses are the same??
Got the correct focal length for the lens maker??
Spectrometer shows suitable absorption (95% mark is at 380-385 range, not much point in doing it in 1/4 nm increments)
Deaf,
Thanks for that last post, you have confirmed my thoughts as to your approach to eye health and safety.
I guess it's a free world, if you want to play eyeball roulette, at least it is only your sight that is at risk ---- sadly, it's probable that your attitude is likely to carry through to other issues aviation---- if, in fact, your are a pilot.
With apologies to Billy Wobblenullanulla, Twelfth Night, Act II, Scene V:
"Some are born stupid, some achieve stupidity, and some have stupidity thrust upon them".
Tootle pip!!
Thanks for that last post, you have confirmed my thoughts as to your approach to eye health and safety.
I guess it's a free world, if you want to play eyeball roulette, at least it is only your sight that is at risk ---- sadly, it's probable that your attitude is likely to carry through to other issues aviation---- if, in fact, your are a pilot.
With apologies to Billy Wobblenullanulla, Twelfth Night, Act II, Scene V:
"Some are born stupid, some achieve stupidity, and some have stupidity thrust upon them".
Tootle pip!!
Nothing in your link that was not general knowledge from the human factors syllabus, Leadsled.
Can you at least give us a hint as to what this significant risk to a pilots eye health is that glasses blocking 100% of UVA and UVB do not protect against?
Can you at least give us a hint as to what this significant risk to a pilots eye health is that glasses blocking 100% of UVA and UVB do not protect against?
Nothing in your link that was not general knowledge from the human factors syllabus,
glekichi,
I seriously suggest you do a little more homework on the subject, it ain't all just UVA/B protection. To quote somebody or other: " The truth is out there".
Tootle pip!!
