Optometric Management Tip # 134   -   Wednesday, August 11, 2004
Refraction Tips

I realize that Iím preaching to the choir if I write about how to refractÖ the collective skill and knowledge of our readers on this subject is the finest in the world. Nevertheless, in the interest of continuing the quest for refractive accuracy and efficiency, Iíll share a few ideas that have worked for me. Itís interesting that the topic of refraction is almost never seen in any of our journals, yet itís probably the most frequently performed procedure in our field and itís the basis for most of the work we do. We all do it all day; we just donít talk about it!

As with every aspect of my practice, I think about refraction from the patientís point of view. The patientís experience in my office and the confidence he develops in our services are of paramount importance. I think the subjective manifest refraction is a little unsettling to patients. They wonder if they are giving the wrong answers, and will this affect how well they see with new glasses? Letís face it; some of the choices we present to the patient are inherently difficult. Many choices are not difficult at all Ė but some are, such as adding an extra -.25 D. sphere in a young person, or the axis choice in a JCC test when the handle is close to the final axis, and there is low cylinder power. These choices will look about the same, as we all know, and itís hard for an untrained person to choose, or even describe what they are seeing, when theyíre being asked which choice is better.

So here are few thoughts to consider on refraction:

My goal: To make the refraction fast, easy, pleasant, and of course, accurate Ė while instilling confidence in the patient.

Starting point. My technician dials the starting lens prescription into the phoroptor before I even come into the room. Every few seconds counts when you add up days, weeks or months of patients, and I donít want to be distracted from my conversation with the patient to do it myself. My starting lens is the habitual distance prescription, if there is one, or the autorefraction if there isnít. I was taught in school to start the refraction from a position of high plus, and then unfog, but with experience, I learned I can just fog one or two clicks to make sure Iím not over-minused, and then find BVA with spheres before proceeding with the JCC.

Communication. I like to keep the instructions simple. I used to give what I thought was an impressive speech about what I was about to do in this test, but now I just do it instead of talking about it. Patients arenít impressed; they just get more confused when you try to make it complicated. I can provide more explanation if needed as we go along, but a simple ďwhich is clearer; lens #1 or #2, or are they about the same?Ē works well.

Easy Snellen line. I like to use a line on the acuity chart that is easy for the patient to see when Iím giving them choices. I can go to a smaller line to determine the final VA, but the choices are easier to make if the patient is not straining to see it.

Patience. I think some ODs get annoyed when patients donít respond perfectly. They may not even realize the annoyed tone in their own voice Ė but it speaks volumes to the patient. Youíd think weíd be used to confused patients by now! Many patients have trouble making refractive choices, or understanding directions. Keep in mind, if the refractive experience is unpleasant for the patient, they wonít want to return and they wonít refer others. I like to reassure the patient frequently that all is going well with phrases like: ďYouíre doing great.Ē ďSome of these choices are easy, some arenít.Ē

All the time in the world. While I work hard to make the refraction quick overall by working smarter on the procedural steps, during the test, I want the patient to feel that Iím in no rush at all. Thatís not a dichotomy Ė itís an art that we can work on. A short pause between choices and speaking slightly slower does wonders.

Reversals. At the end of the refraction, I want my patient to think: ďthat wasnít so bad Ė I think I did well on thatĒ. Recognizing that the toughest choices are the ones where I am at the end point of sphere, cylinder or axis, I try to avoid what I think the end point is. For example, if I think the axis is going to be 80, based on the lensometry and autorefraction, I will set the cylinder axis at 70 when going for axis with the JCC. If the patient moves me toward 80, Iíll then go to 90 and do the axis test again. If they move me back toward 80, Iím done with the axis test, and the patient never had to make a tough choice, which would have occurred had I set the axis right at 80.

Minimalistic. I try to keep the number of lens choices requested of a patient to an absolute minimum by offering only choices that yield maximum results.

Quick cylinder check. If I think the patient has no astigmatism, but I want to confirm that subjectively, I dial in .50 D. cyl axis 180, and I use the JCC to test for power at 180. The patient should choose white dot (on my minus cylinder phoroptor), rejecting the .50 D. I then rotate the axis to 45 degrees and repeat the power test. If I continue to find the cylinder power rejected, I go on to test it at 90 and 135. If the patient ever chooses the red dot at any of my 4 test axes, I know they have more cylinder near that axis.

Quick over-minus check. There are many good tests to prevent over-minusing, including duo-chrome, but one of my favorites goes like this. When I believe Iím at the end point binocularly, I say to the patient, ďtell me if the next lens I show you makes your vision worseĒ. I then add +.25 D. sphere OU. He should say yes, that he notices a slight blur. It seems very simple, which is the beauty of it. After asking the patient to always choose the better lens, asking him if a lens makes things worse puts him in a different perspective, and he can easily judge.

Next time you get one of these classic patient responses, remember to keep smiling!
Doc: Which is better, number three or number four? Patient: Actually, number two was better.

Doc: Can you read that line? Patient: I can read the T, Z, V and L but I canít see the E or the C.

Best wishes for continued success,

Neil B. Gailmard, OD, MBA, FAAO
Chief Optometric Editor, Optometric Management