Author Topic: Displaying Corneal Angle at 0 and 180 Degrees on 10mm Coord  (Read 5075 times)

Michael

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For those of you wanting to fit scleral lenses using the methods outlined by Randy Kojima at his Australian and New Zealand presentations we have provided the following download:
 
Corneal Angle at 0 and 180 Degrees on 10mm Coord
 
Once this file has been imported into Medmont Studio you can display the following attributes for E300 exams:
  • Corneal Angle at 5mm 0o
  • Corneal Angle at 5mm 180o

These will provide you with the surface normal angle at 0 and 180 degrees and will aide in determining the depth of the anterior chamber and the required tangent angles of your scleral lenses.
 
These attributes can be added to your E300 exams by following these steps:
  • Download and extract the corneal angle at 0 and 180.mxf file from the zip file.
  • Open Medmont Studio.
  • Click on the Medmont Application button (the Medmont Logo) in the top left of the screen.
  • Click on the Import menu entry.
  • Browse to the location of the corneal angle at 0 and 180.mxf file you extracted in step 1.
  • Click on the Open button.
  • Open any E300 exam by selecting it in the Patient tree.
  • From the ribbon bar ensure that Display > Show/Hide > Attributes is checked.
  • At the bottom of the E300 exam switch to the list of attributes if it is not already displayed.
  • Click on the Arrange button.
  • From the list on the left select Corneal Angle at 5mm 0 and Corneal Angle at 5mm 180
  • Click on the single arrow pointing to the right.
  • Click on the OK button.
  • From the bottom of the attributes panel click on Edit...
  • From the drop down list select E300 Exam.
  • Click on the Evaluate All button.
  • Click on Yes to confirm you want to re-evaluate all of the attributes.
  • Wait for the process to finish.
  • Click on the Close button.

You will now see the following attributes displayed in the attributes panel:
  • Corneal Angle at 5mm 0o
  • Corneal Angle at 5mm 180o

These will only be evaluated if valid data has been captured at a 5mm radius at 0 and 180 degrees.
« Last Edit: September 05, 2016, 09:14:04 am by Michael »
Senior Software Engineer
Medmont Pty. Ltd.

Forrest

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Re: Displaying Corneal Angle at 0 and 180 Degrees on 10mm Coord
« Reply #1 on: January 20, 2013, 12:13:41 pm »
Hi Michael,

Can you show mt the command or attribute for calculating the corneal angle at 12mm chord length please?

In the attribute command I saw two "5" in the formula, should I change both "5" to "6" please?

Best regards,
Forrest

Grant

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Re: Displaying Corneal Angle at 0 and 180 Degrees on 10mm Coord
« Reply #2 on: January 25, 2013, 01:20:07 pm »
Yes you should change both to 5.   You should however create a new attribute (eg Corneal_Angle_at_6mm_0) rather than just editing the 5mm one.  This is because each attribute has a unique ID and so just changing the definition may product unexpected results when importing/exporting between databases.

Forrest

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Re: Displaying Corneal Angle at 0 and 180 Degrees on 10mm Coord
« Reply #3 on: January 30, 2013, 12:21:30 pm »
Dear Grant and Michael,

Will is be possible to generate an attribute to calculate the longest "half chord length" automatically for calculating the corneal angle at 0 and 180 degree please?

As the longest "half chord length" I can got for each patient by the compoiste eye function is different, the "auto longest half chord length" will greatly reduce the time to calculate the limbal corneal angle in scleral lens fitting. Also, I found that, mostly, the longest half chord length in nasal side is shorter than that in temporal side.

Best regards,
Forrest

david@soflex

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Re: Displaying Corneal Angle at 0 and 180 Degrees on 10mm Coord
« Reply #4 on: September 04, 2016, 06:25:50 pm »
Hi there, tried to download this but received download error.
Is there a different URL that i can use?
Thank you

David

 

Adam

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Re: Displaying Corneal Angle at 0 and 180 Degrees on 10mm Coord
« Reply #5 on: September 05, 2016, 09:31:39 am »
Hi David,

The link should work now, thanks for pointing that out.

Regards,
Adam

alon brondwine

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Re: Displaying Corneal Angle at 0 and 180 Degrees on 10mm Coord
« Reply #6 on: September 09, 2016, 09:04:52 pm »
Hi,
Can i have the attribute for calculation of the  H15 Av , EH cord ,EH 0-180 , or other that can help fit scleral lenses like the one presented in the "Understanding the Attributes Window" from you tube .
Thanks

Adam

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Re: Displaying Corneal Angle at 0 and 180 Degrees on 10mm Coord
« Reply #7 on: September 12, 2016, 02:48:28 pm »
Hi Alon,

You make these attributes yourself by creating a new attribute and defining the equation. You can set this to whatever you want, they are not defined in Medmont Studio.

Regards,
Adam