Download to read offline
Uploaded byBABLI SHARMA
NPC.pptx
The document outlines a procedure for testing the near point of convergence using specific equipment, including a gulden fixation stick, penlight, and red/green glasses. It describes how to conduct the test by moving the fixation stick towards the patient while monitoring their ability to see a single target and recording the distance at which diplopia occurs. Important points emphasize the need for repeated tests to ensure accurate results and careful observation of eye movement.
In this document
Powered by AI
Presentation by Babli Sharma on measuring near point of convergence using specific equipment and procedures.
More Related Content
NPC.pptx
- 1. Near Point of Convergence ByBabli Sharma M. Optom, B.Optom
- 2. EQUIPMENT NEEDED Penlight Gulden fixation stick Red/green glasses Gulden fixation stick Red/green glasses Penlight
- 3. SETUP If thepatient wears glasses for close work, these should be used. Hold Gulden fixation stick tongue depressor 40 cm from patient’s face at eye level. Ask the patient to look at the isolated 20/50 target on the Gulden fixation stick.
- 4. PROCEDURE Slowly movethe fixation stick toward the patient at eye level and between the two eyes. Ask the patient to keep the target one for as long as possible. Ask the patient to tell you when he or she sees two targets. Once diplopia occurs, move the fixation stick in another inch or two and then begin to move it away from the patient Ask the patient to try and see “one” again. Also watch the eyes carefully and observe whether the eyes stop working together as a team (one eye will usually drift out). Record the distance at which the patient reports double vision and when the patient reports recovery of single vision. Repeat the test using a penlight and red/green glasses if you suspect that dissociation may reveal a more receded NPC.
- 5. IMPORTANT POINTS Repeatthe test several times if results are not definitive. Watch the patient’s eyes and try to objectively determine when the break and recovery occur
- 6. REFERENCES Clinical managementof Binocular Vision Heterophoric ,Accommodativ e, and Eye Movement Disorders by Mitchell Scheiman, Bruce Wick, 4th edition .