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  1. #1
    Rising Star
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    Digital Eye Testing Chart

    Hi all,

    I am currently using a light projector for testing vision and doing refractions.

    I am thinking of using digital eye testing chart with a LCD monitor.

    Anyone using digital eye testing chart? Can you share your experience with these charts? Which is a good software and how much do they cost?

    Thanks

  2. #2
    Master OptiBoarder rbaker's Avatar
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    Microsoft PowerPoint. You should be able to buy a copy in Singapore for about a buck. You can make multilingual charts, graphics, Landoldt Rings or whatever and scale the letters for any length lane. You can also play around with contrast or whatever other parameter suits your fancy.

  3. #3
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    How do you deal with flipping from screen to screen? Do you basically just use an "up" and a "down" key on a remote?

  4. #4
    Master OptiBoarder rbaker's Avatar
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    Hyperlink from a menu.

  5. #5
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    Quote Originally Posted by rbaker View Post
    Microsoft PowerPoint. You should be able to buy a copy in Singapore for about a buck. You can make multilingual charts, graphics, Landoldt Rings or whatever and scale the letters for any length lane. You can also play around with contrast or whatever other parameter suits your fancy.
    Interesting, r u doing that?

    Maybe you can send me the program you have done . Thanks. :cheers:
    There is no link. Can you please send the link via pm?

  6. #6
    Master OptiBoarder rbaker's Avatar
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    No, I am not doing that any longer. I am retired and spend most of my time fishing, hunting and traveling about. I suppose that I could make up a pps and send it to you but I feel that I would be doing you a disservice. You should really add to your skill set and do it yourself. It’s not much of a challenge.

  7. #7
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    Quote Originally Posted by rbaker View Post
    No, I am not doing that any longer. I am retired and spend most of my time fishing, hunting and traveling about. I suppose that I could make up a pps and send it to you but I feel that I would be doing you a disservice. You should really add to your skill set and do it yourself. It’s not much of a challenge.
    It was much of a challenge for me. I couldn't get it done right. The doctor is picky, so we bought a commercial version. One of the best investments made. Worth it for the Wow effect alone.

  8. #8
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    Quote Originally Posted by MarcE View Post
    It was much of a challenge for me. I couldn't get it done right. The doctor is picky, so we bought a commercial version. One of the best investments made. Worth it for the Wow effect alone.
    hI,

    can you share with us which commercial software you are using for your computerized test chart?

    I have searched the web. In the US i believed most people use Acuity Pro, and the Smart System. In the UK, they have Test Chart 2000.

    As there are no distributors in Singapore for the above softwares, i am concerned about the servicing of the product if anything happened.

    For these software, do you pay a 1 time license or yearly license?

    Also, if your computer were to crash and needs the software to be re installed, do you need to buy a new software or pay additional license?

    Hope anyone who has experience with computerized test chart can share your experience 9in using these software) as I am thinking of getting one of those software for my consulting room.

    Thanks. :cheers:

  9. #9
    Bad address email on file Graham McPartland's Avatar
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    Lightbulb Sharp System Visual Acuity Software

    I use Sharp System visual acuity software.

    This is software I developed. Free updates & support for life! Version 3 is about to be released...here is more info.
    Last edited by Graham McPartland; 02-18-2008 at 02:36 AM.

  10. #10
    Ophthalmic Optician OptiBoard Gold Supporter
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    Quote Originally Posted by Graham McPartland View Post
    I use Sharp System visual acuity software.

    This is software I developed. Free updates & support for life! Version 3 is about to be released...here is more info.
    I don't like dealing with companies that have no phone numbers, especially when it comes to support. Free support? Maybe, but how soon, and it's all via e-mail?
    Ophthalmic Optician, Society to Advance Opticianry

  11. #11
    Bad address email on file Barbaraa's Avatar
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    Well, you can go for Digital Optometry’s Spectrum if you like. They offer widest variety of opto-types, chart layouts and new features such as Randomization, Duochrome, Wide Spacing, Onscreen pointers, Wheelchair Button. You can get the Duochrome screens with some unique innovative balancing techniques. You just can install this in your PC or laptop and use.

    You can simply pay $ 70 for 14 day trial license and check before you buy the advanced version. If you are willing to buy a yearly license, you will have to pay around 600 dollars and for an unlimited version you will have to spend around 1850 dollars I guess. It is available in Asia (You live in Singapore if I’m not mistaken) and they will b able to help you via their 24hrs contact center assistance.


    Before buying any software, read the REAL customer reviews and feed backs. It is important to know about the product properly before you spend a few hundred dollars.

  12. #12
    Ophthalmic Optician OptiBoard Gold Supporter
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    Has anyone else tried any software, other than what is listed above?
    Ophthalmic Optician, Society to Advance Opticianry

  13. #13
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    For anyone capable of using FOSS (free open source software) there is this:
    http://radagast.ca/snellen/snellen.html

    I'll be setting it up on a Raspberry Pi with a usb remote. Expect it to cost $250 with monitor, mount, cables, remote.
    I'll write back once I have it tested.

  14. #14
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    TV Feature: displaying images

    Quote Originally Posted by hbvision View Post
    For anyone capable of using FOSS (free open source software) there is this:
    http://radagast.ca/snellen/snellen.html

    I'll be setting it up on a Raspberry Pi with a usb remote. Expect it to cost $250 with monitor, mount, cables, remote.
    I'll write back once I have it tested.
    Most modern televisions - especially large screen televisions - have a USB port. These are typically used for firmware updates. However, it is also possible to place images on to USB drives and have them play on the television. For example, on my very inexpensive LCD TV, I have to change the TV's 'Source' to 'USB' - then I can browse the images on the USB drive using the remote control.

    It would seem that such a solution would work for displaying eye testing charts by displaying the eye charts in whatever software creates them, and then taking screen shots and saving those to the USB drive.

  15. #15
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    Quote Originally Posted by hbvision View Post
    For anyone capable of using FOSS (free open source software) there is this:
    http://radagast.ca/snellen/snellen.html

    I'll be setting it up on a Raspberry Pi with a usb remote. Expect it to cost $250 with monitor, mount, cables, remote.
    I'll write back once I have it tested.
    Did you manage to setup the snellen software? i wanted to try , but did not have a chance ...need to download a copy of linux...i wanted to do it on VMWARE... if u setup...can u tell me other than snellen chart...what other features is in that software other than snellen chart...

    Thanks

  16. #16
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    Quote Originally Posted by danielccn View Post
    Did you manage to setup the snellen software? i wanted to try , but did not have a chance ...need to download a copy of linux...i wanted to do it on VMWARE... if u setup...can u tell me other than snellen chart...what other features is in that software other than snellen chart...

    Thanks
    Question (to anyone): Aside from the Snellen chart, what features would you be looking for?

    I'm a hardware and software developer and have been for nearly 40 years. I can think of a half-dozen much less expensive ways to get this done using off-the-shelf components. Building an entire Linux machine just to show a single graphic seems to be overkill.

  17. #17
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    Had some software installation problems and didn't finish it yet.
    Haven't given up, but other things are taking priority.
    Should be able to easily image when done, and will post a download link at that time

  18. #18
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    Looking for eye testing software solution

    Quote Originally Posted by hbvision View Post
    For anyone capable of using FOSS (free open source software) there is this:
    http://radagast.ca/snellen/snellen.html

    I'll be setting it up on a Raspberry Pi with a usb remote. Expect it to cost $250 with monitor, mount, cables, remote.
    I'll write back once I have it tested.
    Did you try doing this? I have a similar reqirement and I want to achieve this using android tv box.

  19. #19
    What's up? drk's Avatar
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    Lots of goodies.

    Visual acuity is indeed measured by a Snellen chart, but you have to run a few patients to see what other things would help.

    My setup is programmable, so I can show a series of charts in a certain order.

    There are "line isolation" options, as well as "letter isolation" options.

    There are refracting aids, as well, such as polarized projection (not on an LCD screen, of course) to be used in conjunction with polarized lenses in the phoroptor for special tests, etc.

    It's more involved than...meets the eye!

  20. #20
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    Quote Originally Posted by drk View Post
    Lots of goodies.

    Visual acuity is indeed measured by a Snellen chart, but you have to run a few patients to see what other things would help.

    My setup is programmable, so I can show a series of charts in a certain order.

    There are "line isolation" options, as well as "letter isolation" options.

    There are refracting aids, as well, such as polarized projection (not on an LCD screen, of course) to be used in conjunction with polarized lenses in the phoroptor for special tests, etc.

    It's more involved than...meets the eye!

    Nothing you've mentioned is impossible, let alone difficult, for the platforms I have in mind. I can see this problem being solved for ~$100 in hardware and a fraction of that for the software - and no need to load Linux.

  21. #21
    What's up? drk's Avatar
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    Neat! Make some money.

  22. #22
    Master OptiBoarder rbaker's Avatar
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    If you are wicked smaaht you can create anything you may want with Microsoft PowerPoint; Snellen, illiterate E's, Landolt Rings, whatever.

    In fact, you really don't really have to be too smaaht. I did this back in the late eighties with PowerPoint v2.
    Last edited by rbaker; 03-11-2018 at 10:47 AM.

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