[optimal] Re: Fundus camera cleaning regimens
- From: Marshall Tyler <marshalletyler@xxxxxxxxx>
- To: optimal@xxxxxxxxxxxxx
- Date: Wed, 10 Jul 2013 22:37:37 -0400
Fundus camera objective lens cleaning:
Break down the problem to get to the correct solution.
Coated or uncoated lens? Old 30degree Zeiss is uncoated.
Front or rear (inside the camera) side of the lens? Is the lens removable?
What (dirt) are we removing?
Tear film, flicked spots from eyelashes? These are WATER Soluble so use
soapy water first!!
Grease spots: kids fingers or nose prints? Then proceed with the either/
alchol mix IF uncoated lens.
as said by someone else, MAKE your own real-cotton Q-tips using a wooden
stick from a manufactured cotton-stick thing. Why not just use the pre-made
ones?? 'cause they have GLUE which will be dissolved with our
non-water-based cleaners.
If Coated lens, check with the manufacturer for safe protocol.
Canned "air" is pretty dirty stuff and high powered. If you must use it,
shoot it across the lens to have the venturi effect lift the dirt off of
the lens, not shove the dirt into the coatings.
Dust: use a non-brush hand air blower (baby snot [nose stuff] remover bulb)
bulbs with brushes WILL get grease on them IF they are not locked up.
(nurses and Drs just can't keep their fingers to themselves - they just
don't understand that that nice little brush is High-tech cleaning
equipment until it is greased up and useless.
BTW, Zeiss has a nifty hand spun turntable for their little lens. The
JOPhas a very old article on using a kids record player to automate
this task.
Zeiss has a lens cleaning set: 000000-1216-071
I think that you can only order 3 at a time and must ship via ground.
Pretty flammable stuff! Too many oz of stuff cannot be put into a box.
Either (and many of the volitale cleaners), when left open will absorb
water from the room air. So, open the container, tip a bit into a
shot-glass sized container, and reclose the original bottle right away.
Some lenses have a little black dot on the back of the lens - this is an
anti-reflection reducer (remember the double light reflex when you use an
indirect ophthalmoscope? Anyway, you can remove (as reported by many years
ago by an over-diligent photographer, it BUT the lens will then need to be
replaced.
Well, that is all for now, time for rest so I can go sailing!
*Marshall*
Marshall E Tyler
sv *Silk*
*
*
On Wed, Jul 10, 2013 at 8:48 PM, Bennett, Timothy <tbennett1@xxxxxxxxxxx>wrote:
> It's probably too simple for the Scientific Session, but would be
> perfect for the new Pearls, Tips, & Tactics course.
>
> tim
>
>
>
> On Jul 10, 2013, at 8:43 PM, "Peter Hay,CRA, FOPS" <peterhay@xxxxxxx>
> wrote:
>
> Hello Richard-
>
> How do you use this device ???? Sounds like a great short scientific
> lecture presentation !!
>
> Peter
>
> On 5:38 PM, "Hackel, Richard" <rhackel@xxxxxxxxxxxxx> wrote:
>>
>> I’ve had great luck with these lens cleaning pens:
>>
>>
>>
>>
>> http://www.bhphotovideo.com/c/product/202075-REG/Celestron_93575_LensPen_Tool.html
>>
>>
>>
>> One of the Zeiss service people recommended it when he was here cleaning
>> the camera. I don’t know how they work, but like the saying on the Bon Ami
>> can says: ‘hasn’t scratched yet.”
>>
>>
>>
>> Richard
>>
>>
>>
>> *From:* optimal-bounce@xxxxxxxxxxxxx [
>> mailto:optimal-bounce@xxxxxxxxxxxxx <optimal-bounce@xxxxxxxxxxxxx>] *On
>> Behalf Of *Hugo_Hur@xxxxxxxxx
>> *Sent:* Wednesday, July 10, 2013 5:04 PM
>> *To:* optimal@xxxxxxxxxxxxx
>> *Subject:* [optimal] Re: Fundus camera cleaning regimens
>>
>>
>>
>> Noelle,
>>
>>
>>
>> We recommend first using a blower to remove any dust/particles that may
>> damage the objective lens.
>>
>>
>>
>> You can then use a lens cloth and denatured alcohol. Do NOT use
>> isopropyl alcohol or other harsh cleaning chemicals, which can remove the
>> coating on the outer surface of the objective lense.
>>
>>
>>
>> Sincerely,
>>
>>
>>
>> Hugo Hur
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Jul 10, 2013, at 4:59 PM, "Noelle Pensec" <npensec@xxxxxxxxx> wrote:
>>
>> Hello OPTIMAL,
>>
>> I am wondering if anyone has a set protocol for cleaning fundus
>> cameras. Specifically, how often do you clean the front objective lens, and
>> what methods do you use? We recently discovered that one of our camera
>> lenses was badly scratched from someone cleaning with something abrasive
>> (seriously looks like it was done with sandpaper..thankfully it does not
>> affect the image at all in most cases)
>>
>> Any other tips on camera cleaning and maintenance would be welcome!
>>
>> Thanks very much!
>>
>> Noelle Pensec
>>
>>
>>
>>
>>
>> Noelle Pensec
>> Columbia University Medical Center
>>
>> Diagnostic Imaging Specialist
>>
>> (212) 305-0647
>>
>>
>>
>>
>>
>> **********************************************************
>> Electronic Mail is not secure, may not be read every day, and should not
>> be used for urgent or sensitive issues
>>
>
> --
> Sent from my Android phone with K-@ Mail. Please excuse my brevity.
>
>
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