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  1. #1
    WWPierre's Avatar
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    Default The North End of the Optics Chain



    I have just returned from my optomitrist, after being fitted with contact lenses.

    Near-sighted and far sighted folks have it easy, as the focus on their scope accounts for that. Those of us with Astigmatism, however, need correction between the eyepiece and the mark 1 eyeball.

    Luckily for me, and the rest of us astigmatics, soft lens technology has recently progressed to the point of providing correction, effectively bringing us into the near-far camp.

    The hardest part is getting used to putting a foreign object in your eye, and taking it out again, but I am told practise makes perfect.

    I don't know if this is typical, but it seems the first pair of contacts are free. Sort of like the illegal drug market. I only had to pay a $50 fitting fee to the optomitrist. After that, you need to buy 6 sets at a time, which is either $180 or $360.

    I didn't pay much attention to the figures, because I will be using them for strictly astronomy, so, assuming 360 hours per set, the free samples should last me 2 or 3 years. After that, the replacements should last the rest of my life.

    I will need to get a cheap pair of reading glasses from the drugstore for reading charts and stuff in the field.

    First Light:

    After about 20 minutes of settling in time, I took a stroll outside, and the distance was crisp and clear. I can't wait to try them through the eyepiece. Clear skies predicted for Friday.

    Off to practise getting them in and out.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5; Orion 127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  2. #2
    MarkM's Avatar
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    Default

    Interesting.

    Lately I have thought a lot about Lasik so that I may see things through the eyepiece better. Contacts would be a lot cheaper though.

    Now that I am no longer a practicing organic chemist, wearing contacts isn't taboo (they are forbidden in most synthesis labs because reagents trapped under lens during a mishap could potentially eat away at the eye before one reaches the eyewash station)
    Last edited by MarkM; 08-26-2009 at 10:20 PM.
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    Instruments: Obsession 15" Dob; Orion XT8i; 2" refractor (Galileoscope); Televue EP arsenal; Bushnell 7X50 binos
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  3. #3
    psonice's Avatar
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    Default

    Wow, that gave me quite a shock at first glance: suggesting the first pair would last a couple of years, and the replacements would last the rest of your life... I missed the "6 pairs" part!

    Is it likely your eyesight will get worse (or better!) though? If so, the 6 pairs might only last a few years before you need a different strength lens. I suspect my sight is starting to deteriorate a little, although I don't need glasses yet, but my wife had an eye test today and hers is improving - perhaps she won't need glasses at all in a few years.

    Good luck making it to the second set of replacements anyway

  4. #4
    WWPierre's Avatar
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    Default

    Quote Originally Posted by psonice View Post
    Is it likely your eyesight will get worse (or better!) though?
    Nah, astigmatism is congenital. My perscription hasn't changed appreciably since I stopped growing. (up) (I am still growing out)
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5; Orion 127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  5. #5
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    Default

    Are you sure the lenses will last as long as you think? My wife's contacts seem to start bothering her eyes about a month after she takes them out of the package, no matter how much (or little) she wears them. I wonder if it's something to do with being stored in solution for a certain amount of time.

    I had astigmatism, I think I'd shell out $$$ for the dioptrix correctors rather than use contacts. I just can't stand the thought of sticking something to my eyeball (then again, some of my EPs come very, very close!)
    10" f/5 L.E.O. (Lightbridge with Enhanced Optics)
    Celestron Skymaster 9x63 Binocular

  6. #6
    WWPierre's Avatar
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    Default

    Quote Originally Posted by sevenhelmet View Post
    Are you sure the lenses will last as long as you think? My wife's contacts seem to start bothering her eyes about a month after she takes them out of the package, no matter how much (or little) she wears them. I wonder if it's something to do with being stored in solution for a certain amount of time.

    I had astigmatism, I think I'd shell out $$$ for the dioptrix correctors rather than use contacts. I just can't stand the thought of sticking something to my eyeball (then again, some of my EPs come very, very close!)
    That could very well be, Seven. (about the deterioration)

    I haven't been able to successfully get them installed by myself yet, so I know what you mean. I need to get it down by tomorrow night; best conditions since I got my scope forecast.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5; Orion 127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

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  7. #7
    ebidar's Avatar
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    Default

    Wow, I hope you are able to be ready, good luck. Let us know.
    Orion XT8i Dobsonian
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  8. #8
    psonice's Avatar
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    Default

    The sight of a good, clear, dark, but slightly out of focus sky will surely help you to get them in

 

 

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