Changes to Plaquenil risk calculator

I've made a few changes to the plaquenil risk calculator. A few of the changes were in the interest of user-friendliness, but the more important changes are as follows.


I removed the chloroquine calculations. I can't recall the last time I saw a patient taking this (as opposed to hydroxychloroquine) and I feel presenting it as an option was only a potential source of confusion or errors.

I included some sliders for adjusting height and weight for BMI calculations. On the surface this may seem cosmetic but it also allows for our metric system users (which I call the "smart ones") to enter these values in kilograms and meters instead of ponds and feet/inches.

I made the cumulative Plaquenil dose calculator a bit more robust. It originally only accepted a dose and a duration in months and years. However, I realized that 1) Sometimes dosages change and 2) sometimes doses are irregular.

For example, if a person takes 400mg bid x 1 year, then changes to 200mg qd x 1 year, you can now add rows to the calculator by pressing the "+" button. You can do this as many times as you like.

plaquenil cumulative add row

In addition, I realized that I was seeing a lot of patients that were taking dosages like this: 400mg every other day, with 200mg on the opposite days. I added a "qod" sig option that can cover these more difficult prescribing patterns.

plaquenil cumulative qod

Hopefully that'll cover the majority of our needs for these calculations. If you run into any other commonplace scenarios that I haven't covered please let me know.


CLs & EMRs: A better way

 I’ve spent the last decade writing contact lens calculators, cataloguing contact lenses, and writing code to search and display contact lens information. After all the nights and weekends hunched in front of my computer, and despite the fact that I’m proud of what I’ve created, you might be surprised to hear what I say next: I wish there was less need for EyeDock. Yup, you heard me. I feel that a site like EyeDock should be a little superfluous.

I’ve felt this way since our clinic switched to an EMR 5 years ago. Mind you, I’m not using one of the cool optometry-specific EMRs that a lot of you are using. My EMR is Epic, which does cardiology, oncology, pretty much everything else, and eye care. I actually think it’s good for what it is, but it’s not tailor-made for ODs.


Read more: CLs & EMRs: A better way

Smarter soft lens searches

Hello EyeDock users,

Optical cross nice

I’ve been working on a new version of EyeDock’s soft lens searches for quite a while now, and think it’s finally time to show you the result. I’m excited about the new features and I hope you’ll find them useful in your practice. 

I’m considering this a beta version for a short while, at least until all of you get a chance to put this through it’s paces. As a solitary developer (who spends most of his time examining eyeballs) it’s difficult for me to test EyeDock on every OS, browser, etc., so I need you all to help me out. So it goes without saying, let me know if you run into any problems. When I feel it’s ready I’ll more completely integrate it into EyeDock.

See below for a description and a video describing some of the highlights of the new searches.

<——click Soft Contact Lens Searches to use the searches!




Todd M Zarwell OD FAAO



I made a number of changes to simplify the interface, yet keep the searches robust . However, the feature that I’m most excited about is the search by refraction feature.

In the “old days”, searching for a lens by power used to take multiple steps: Vertexing. Transposing (at least for some of us). Filling out numerous fields on a form. Picking a lens. Finding out the -2.25 cyl doesn’t come in axis 50. Picking a different lens.

Now, this can be done with a single step. Type (or paste in) your refraction:

Refraction input


EyeDock will then:

1)  Vertex the refraction to establish the ideal contact lens power (and show the results on an optical cross)


Vertexted optical cross


2) Find all appropriate lenses

3) Search within each lens’s parameters to find the best powers available for that lens

4) Calculate a theoretical VA for each lens to help compare and contrast your options

Search by refraction results



Soft lens companies

Here's a list of the soft lens companies listed in EyeDock. Click a company name to view a list of their lenses.


Read more: Soft lens companies
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