cruzlite 0 #1 October 22, 2003 Back in the sport this past weekend, with new Rx goggles- (from new script/with 2.0 both eyes) I was all set to make my first jump in 12 yrs. 288 manta- piece of cake, right ? First flare@25ft,second@20ft...what the #%&! ??? NEVER had this problem before. Long story/short; Talk to Doc today, turns out "at 2.0-you have no depth perception". Thanks for the first jump course, Thanks for the PLF practice, Thanks for every one of the 288 sq. ft. D Quote Share this post Link to post Share on other sites
marks 0 #2 October 22, 2003 dont you think it might be the incurrency more than the glasses? it might be the glasses also... but being out of the sport for 12 years is a long itme.. anyways... welcome back! Quote Share this post Link to post Share on other sites
indyz 1 #3 October 22, 2003 I have two pairs of glasses and a pair of SportRX goggles, all made to the same prescription (1.6-1.8, if I recall correctly). I see the world a little bit differently through each of them, especially my depth perception. I got used to it, and you will too. Quote Share this post Link to post Share on other sites
cruzlite 0 #4 October 22, 2003 Mark, You are the fourth person with over 2000 jumps to advise/coment on this issue (thats over 13000 jumps experience). I both respect & appreciate the input, thanks. Quote Share this post Link to post Share on other sites
cruzlite 0 #5 October 22, 2003 Brian, Doc suggests I use my trifocals, which I plan to do. Have you tried this? Have any problems with high flares? Also how do you load your spectre 170? Thanks D Quote Share this post Link to post Share on other sites
indyz 1 #6 October 22, 2003 QuoteBrian, Doc suggests I use my trifocals, which I plan to do. Have you tried this? Have any problems with high flares? Also how do you load your spectre 170? Thanks D I don't have a need for bi- or tri-focals. I load my Spectre at about 1.15 or so. I did have some problems with flare height when I originally started jumping with them. It only took me a half dozen jumps to get over it, if that. I have about 160 landings with the same pair of goggles now and I've gotten it pretty well dialed in. I still have a tendency to plane out for my surf a little higher (6-12 inches) than I want to when I'm wearing my goggles, but it's no big deal. That problem goes away when I wear my normal pair of glasses. Quote Share this post Link to post Share on other sites
grega 0 #7 October 22, 2003 Just a tip: You don't actually need a depth perception, if you look at the horizon when you're landing."George just lucky i guess!" Quote Share this post Link to post Share on other sites
skydivingchad 0 #8 October 23, 2003 I'm actually Skydivingchad's wife. And an eye doctor. Depth perception isn't the issue, it's the image size on the back of your eye. A new Rx will give you a slightly different image size than the old Rx. This is normal, but throws your visual perception out of whack for a few days. I'd walk around with the goggles on at home for at least a few hours to let your brain learn the new perception before jumping again. Using a trifocal to figure out when to flare would be a baaaad idea!!!!!!!! A tri or bi focal will focus anywhere from 20 inches and closer, depending on the power. Unless you are going to wait til your face is 20 inches from the ground to flare, which I would think isn't a really good idea, it won't be in your best interests to try :-) Jen Galbraith, OD, MS Sometimes you're the windshield, sometimes you're the bug. Pelt Head #3 Quote Share this post Link to post Share on other sites
cruzlite 0 #9 October 23, 2003 Jen, Had been planning on jumping this weekend with my old trifocals. ( Just got new rig with new 0/p main loaded at 1.21 put together & inspected yesterday.)1st jump with which will be my 1st 0/p jump. ( & at this loading). Needless to say, I am eager to get this thing in the air! I am now planning on following your advice about goggles. I think I will also stick with rental 288 until flare resolved. I CANNOT THANK YOU ENOUGH, -Chad you are a lucky man. Blue Skies, Don Quote Share this post Link to post Share on other sites
Squeak 17 #10 October 23, 2003 my script +625-250 left +650-275 right I have no stereoscopic vision and hence no depth perception I wear Sport Rx 102s and have NO problem flareing at the correct height. It ain't the goggles dudeYou are not now, nor will you ever be, good enough to not die in this sport (Sparky) My Life ROCKS! How's yours doing? Quote Share this post Link to post Share on other sites
cruzlite 0 #11 October 23, 2003 Dude, Does "Depth perception isn't the issue " ring any bells? I would be curious to know what you teach. I did learn one thing from you, that Rx 102's may be the way to go with higher script. Thanks D edit; Is it possible our input does not always catch up with our output? Quote Share this post Link to post Share on other sites
cruzlite 0 #12 October 23, 2003 Chad, Question for Jen please: Actual script is; Sphere OD +2.00 OS +2.25 Goggles are SportRx g101 Since 101's only go to 2.00, I ordered both eyes 2.00 What is your advice? Feel free to PM response along with bill. Also, do you jump? Attachment is something that seems appropriate. Thanks again, Don Quote Share this post Link to post Share on other sites
cruzlite 0 #13 October 23, 2003 grega, I know we are taught to look at the horizon under a round-but I have never heard this advised under a square. Do you look at the horizon when landing your canopy loaded at 1.75? D Quote Share this post Link to post Share on other sites
grega 0 #14 October 23, 2003 Yes, more or less. You don't actually look straight in the horizon and not seeing what's on the ground. But i look somewhere between where i'm going and the horizon (about 0 to 30 degrees below horizon)."George just lucky i guess!" Quote Share this post Link to post Share on other sites
skydivingchad 0 #15 October 23, 2003 Hey Don, Jen again. Yeah, Chad is an extremely lucky man The 0.25 difference between what you ordered and your actual Rx won't make a difference. That is the tiniest possible increment that lenses are made in. It's like the difference between $2.00 and $2.25. Not much, you'll be fine there. I did a tandem jump in April and loved it, even have dreams about skydiving occasionally. Bought Chad his first rig for his birthday in July. I promised myself skydiving lessons after I drop the last 30 lbs I want to... all that damn weight accumulated in grad school sitting on my ass with my nose in a book. So I do read here quite a bit and learn all I can. Probably will start jumping next year. Squeaky... stereoscopic vision and depth perception are two different things. There are something like 10 depth cues with vision, things like relative size (closer things are bigger), relative motion (closer things move more in relation to you), overlapping objects, etc. Stereoscopic vision (brain paying attention to both eyes and taking the two images to perceive depth) is only one cue out of the 10. So not having stereoscopic vision doesn't eliminate depth perception. Probably more than you really wanted to know, eh? Jen Sometimes you're the windshield, sometimes you're the bug. Pelt Head #3 Quote Share this post Link to post Share on other sites
cruzlite 0 #16 October 23, 2003 Jen, It's not more than I want to know. Unfortunately I am not an eye Dr., so I don't understand optics as they relate to the eye and brain. This is why your help is SO valuable to me! You have been most generous with your time & knowledge! Thanks, Don Quote Share this post Link to post Share on other sites
