VISION THREAD (other than colour vision)
Guest
Posts: n/a
Thanks for the replies guys,
It's nice to know that the CAA make it as thorough as possible!!!
I'm pretty confident that I will by-pass the Ishiara tests quickly!!! I've done them enough times and I never get any better at them, and know I never will.
Bring on the lanterns!!
Thanks chaps.
It's nice to know that the CAA make it as thorough as possible!!!
I'm pretty confident that I will by-pass the Ishiara tests quickly!!! I've done them enough times and I never get any better at them, and know I never will.
Bring on the lanterns!!
Thanks chaps.
Join Date: Sep 2007
Location: Cheshire
Age: 78
Posts: 506
Likes: 0
Received 0 Likes
on
0 Posts
Anyone seen this from Aviation House
I must take issue with
As . . . . . said, it is designed to try and catch you out
OK, I know it's not absolutely perfect, but very few things in life are. It is recognised that the present system has failings. Together the JAA and CAA are trying to come up with a better system for the future.
Join Date: Sep 2007
Location: Cheshire
Age: 78
Posts: 506
Likes: 0
Received 0 Likes
on
0 Posts
exactly . . . . . . . . . ! !
the CAD test coming in soon, a fair, practical, aviation environment based test
. . . . . . but hey, might mean the demise of this thread ! !
Join Date: Sep 2007
Location: Cheshire
Age: 78
Posts: 506
Likes: 0
Received 0 Likes
on
0 Posts
mea culpa . . . . . . . . .
I cannot agree that the CAD Test is a fair and practical aviation based test
My second chastisement in less than 24 hours - I think I'll give this a break for a while. Happy Landings to all !
Join Date: Jul 2006
Location: Bethesda, N. Wales UK
Age: 43
Posts: 48
Likes: 0
Received 0 Likes
on
0 Posts
Refractive correction is never measured in anything except 0.25 increments... therefore your -7.8 would unfortunately be rounded to -8.0 which puts you on the very edge of the limit.
No two refractive exams are ever the same therefore there is a chance that if two people did your eye test on same day they would have an error factor of 0.25 to 0.50 diopters so you could either be measured as having -7.75 or -8.25 depending on who did it, your tiredness, eye strain, lighting etc etc.. number of factors.
No two refractive exams are ever the same therefore there is a chance that if two people did your eye test on same day they would have an error factor of 0.25 to 0.50 diopters so you could either be measured as having -7.75 or -8.25 depending on who did it, your tiredness, eye strain, lighting etc etc.. number of factors.
Join Date: May 2007
Location: England
Posts: 81
Likes: 0
Received 0 Likes
on
0 Posts
...For the record
Originally posted by me further up page
Thank God for the CAD test coming in soon, a fair, practical, aviation environment based test, things are looking up, money well spent!
Thank God for the CAD test coming in soon, a fair, practical, aviation environment based test, things are looking up, money well spent!
Originally posted by 2close
Sorry to pull the soap-box back out but this issue really annoys me
Sorry to pull the soap-box back out but this issue really annoys me
Join Date: Jul 2008
Location: London
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
You're absolutely right, I took an eye test and my prescription was actually -9 and -9.25. I have been recommended to go for the NPPL or do a retest against 6/12 on each eye separately and 6/6 together. Unless you tell the optician they will correct you to 6/6 in each eye which would probably be 6/4 together. Apparently 6/12 is a couple of lines higher up the lettered chart and hence the letters are significantly bigger. On that basis I am trying a retest and I hope I can read them with less correction hence fall within the limits for a JAR PPL. I'll get a good night's sleep first too!
Join Date: Jul 2006
Location: Bethesda, N. Wales UK
Age: 43
Posts: 48
Likes: 0
Received 0 Likes
on
0 Posts
I was an ophthalmic nurse before I had my Lasik done.... therefore I had a slight advantage when it came to my research and reading the CAA documentation on requirements as I have a little more understanding of what all the requirements mean.
I'm happy to help anybody who wants more information on the procedure I had done etc.... either reply here so others can see or you can PM me...
JON
I'm happy to help anybody who wants more information on the procedure I had done etc.... either reply here so others can see or you can PM me...
JON
Join Date: May 2005
Location: 6'1" AGL
Age: 45
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
I wrote a letter to the CAA yesterday outlining the issues with my prescription and hope to book a meeting to discuss. I am still in the dark, however, if my prescription is even close to the parameters - can anyone confirm;
Right:
Sph +0.75
Cyl - 6.75
Axis 25
Left:
Sph 0.50
Cyl -4.50
Axis 152.5
?
Thanks in advance.
Right:
Sph +0.75
Cyl - 6.75
Axis 25
Left:
Sph 0.50
Cyl -4.50
Axis 152.5
?
Thanks in advance.
Join Date: Aug 2006
Location: Manchester
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
DB, I'm afraid that the astigmatic component of your prescription (the CYL part) is probably too large for a class 1. The initial limits are 2 dioptres.
Good job on writing to the CAA, thats definitely the best way. If you want a quicker response, (the CAA may take a few weeks to respond), you can take the following document to an optician to get their opinion.
Cheers
http://www.caa.co.uk/docs/49/SRG_MED...%5B2189%5D.pdf
Good job on writing to the CAA, thats definitely the best way. If you want a quicker response, (the CAA may take a few weeks to respond), you can take the following document to an optician to get their opinion.
Cheers
http://www.caa.co.uk/docs/49/SRG_MED...%5B2189%5D.pdf
Join Date: May 2005
Location: 6'1" AGL
Age: 45
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
I should have said, I meant my pre-operative refraction is this current prescription. The CAA have a limit for what it should be prior to surgery. Hopefully, once i've had the surgery it'll be 20/20 - then it's just case of stabilising it!
Join Date: May 2005
Location: 6'1" AGL
Age: 45
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
Thanks Tamesy1
They don't make it easy to find out.
I'm really at a cross roads at the moment (all dependent on my prescription).
My future plans are in the ands of the CAA!!!!
Guess i'm not the only one though...
They don't make it easy to find out.
I'm really at a cross roads at the moment (all dependent on my prescription).
My future plans are in the ands of the CAA!!!!
Guess i'm not the only one though...
Join Date: Jul 2006
Location: Bethesda, N. Wales UK
Age: 43
Posts: 48
Likes: 0
Received 0 Likes
on
0 Posts
the PRE OP refraction they refer to is only the SPHERE AND CYLINDER they dont mention that you can't have lasik for ASTIGMATISM
I Only just realised the above NOW...
The reason for setting a limit for refraction for SPHERE is due to MYOPIA (short sightedness) meaning that lasik doesnt take the risk of RETNAL DETACHMENT away!
Retinal detachment risk occurs in everybody with myopia as they have a longer shape eye which increases risk of the retina peeling away - this is a major ophthalmic emergency.
Obviously you can go blind in minutes not hours if this happens and what if you were on a transatlantic flight ?? i think this is why the limits are imposed!
JONATHAN
I Only just realised the above NOW...
The reason for setting a limit for refraction for SPHERE is due to MYOPIA (short sightedness) meaning that lasik doesnt take the risk of RETNAL DETACHMENT away!
Retinal detachment risk occurs in everybody with myopia as they have a longer shape eye which increases risk of the retina peeling away - this is a major ophthalmic emergency.
Obviously you can go blind in minutes not hours if this happens and what if you were on a transatlantic flight ?? i think this is why the limits are imposed!
JONATHAN
Join Date: Sep 2007
Location: Europe
Posts: 537
Likes: 0
Received 0 Likes
on
0 Posts
But without opposing viewpoints, we would really be going nowhere fast.
Agree with the sentiment but the debate has rolled on for far too long
I don't have a problem with different views but I do have a problem with a restriction that is not based on proven safety factors. I appreciate that non CVD pilots are entitled to a viewpoint but would prefer to see viewpoints that are based on fact not simply conjecture.
Agree with the sentiment but the debate has rolled on for far too long
I don't have a problem with different views but I do have a problem with a restriction that is not based on proven safety factors. I appreciate that non CVD pilots are entitled to a viewpoint but would prefer to see viewpoints that are based on fact not simply conjecture.
Join Date: Sep 2007
Location: Cheshire
Age: 78
Posts: 506
Likes: 0
Received 0 Likes
on
0 Posts
it's spelled: RIDICULOUS . . . . . . . .
chances are they are frustrated pilots that didn't have the nuts to make it in this industry and want to get at those who do
Guest
Posts: n/a
Cheers for the feedback.
I'm chuffed but then the test wasn't really testing me on Aviation colours.
So i'm taking the result with a pinch of salt. I do admit from what I have read about the tests, they do seem a bit dated and a little impractical. But I guess as with everything the CAA have their reasons and as it's a safty thing I don't think they can afford to be anything else but air-tight.
It does make me wonder how some of us would perform if they did test us using different means. For example showing us a picture of Wx radar or EFIS and electronic ADI instrument.
As you say Soup Nazi everything else is backed up by raw data. If the big handle above you starts flashing and screaming and it says: ENG FIRE on it, you cut of the fuel, extinghuish the fire and the rest of it before you even notice the thing was red!
That might be a rather simplistic view on the whole CVD in the cockpit issue but untill I sit down in a cockpit with all these pretty coloured lights and gadgets i'll probably never know if I can / could safely operate it.
I'm chuffed but then the test wasn't really testing me on Aviation colours.
So i'm taking the result with a pinch of salt. I do admit from what I have read about the tests, they do seem a bit dated and a little impractical. But I guess as with everything the CAA have their reasons and as it's a safty thing I don't think they can afford to be anything else but air-tight.
It does make me wonder how some of us would perform if they did test us using different means. For example showing us a picture of Wx radar or EFIS and electronic ADI instrument.
As you say Soup Nazi everything else is backed up by raw data. If the big handle above you starts flashing and screaming and it says: ENG FIRE on it, you cut of the fuel, extinghuish the fire and the rest of it before you even notice the thing was red!
That might be a rather simplistic view on the whole CVD in the cockpit issue but untill I sit down in a cockpit with all these pretty coloured lights and gadgets i'll probably never know if I can / could safely operate it.
Guest
Posts: n/a
Yes sorry Neo they were rather naive comments from myself. To be fair I was just playing devils advocate. I've dipped my toes into this thread every now and again and try to keep up with it's momentum. Not being a commercial airline pilot (Catch 22 coming up)... I can't suggest what tests would be practical and can't genuinely say current CVD tests are inpractical. But then that's becuase of I have no comparison to the real world operation of commercial aircraft. I'm taking a stab in the dark effectively but i'm probably right as you say.
I don't have any examples of saftey violations by pilots with CVD so this backs up our arguement that the filtering in the medicals are probably a bit antiquated. I seem to have the same deficiency as yourself and never seem to have any problems when looking at photos of Papis etc.
Don't worry you didn't offend me. My comments weren't meant to stir the hornets nest in any way. As mentioned they were rather simplistic views on the CVD issue. As we all know it's a lot more compicated than my inexperienced views.
At the end of day i'll always stand up for CVD population and fight our case.
I don't have any examples of saftey violations by pilots with CVD so this backs up our arguement that the filtering in the medicals are probably a bit antiquated. I seem to have the same deficiency as yourself and never seem to have any problems when looking at photos of Papis etc.
Don't worry you didn't offend me. My comments weren't meant to stir the hornets nest in any way. As mentioned they were rather simplistic views on the CVD issue. As we all know it's a lot more compicated than my inexperienced views.
At the end of day i'll always stand up for CVD population and fight our case.
Guest
Join Date: Feb 2001
Posts: 542
Likes: 0
Received 0 Likes
on
0 Posts
Ame
So correct old chap, full marks! Really though if these guys are in fact current jet captains thats even worse. It reeks of old school and the fact that these people can't bring themselves to make change a regulation that cannot be justified makes me think that they are just bureaucrats.
The various regulators world wide make regulations that stipulate the medical standards a candidate must meet to pilot an aircraft generally. These standards cannot possibly be guided by cockpit displays because the regulators have only very broard control over how those displays are presented. I would think that if Collins, Honeywell or garmin decided that one of their EFIS displays required X level of color perception to fly that system then they would insert words to that effect in the manual.
So correct old chap, full marks! Really though if these guys are in fact current jet captains thats even worse. It reeks of old school and the fact that these people can't bring themselves to make change a regulation that cannot be justified makes me think that they are just bureaucrats.
The various regulators world wide make regulations that stipulate the medical standards a candidate must meet to pilot an aircraft generally. These standards cannot possibly be guided by cockpit displays because the regulators have only very broard control over how those displays are presented. I would think that if Collins, Honeywell or garmin decided that one of their EFIS displays required X level of color perception to fly that system then they would insert words to that effect in the manual.
Last edited by PPRuNeUser0161; 10th Sep 2008 at 12:54.