8.1.3 - Manages adult px with heterophoria

Question 1

Reason for treating heterophoria?

Answer 1

-Alleviate symptoms
-prevent phoria from breaking down to a tropia

Question 2

What are the symptoms of decompensating phoria?

Answer 2

-Vision: Diplopia -> usually intermittent & for near / Blurry vision
-Asthenopia: Eye strain /Headaches / sore eyes
-Binocular: Difficulty with stereopsis / difficulty changing focus / mono discomfort

Question 3

What are the main treatment options for a decom phoria?

Answer 3

1. remove the cause of decompensation
2. eye exercises
3. refractive modification
4. prismatic correction
5. surgery

Question 4

1. Remove the cause of decompensation - explain?

Answer 4

Change these factors:
-long hours of close work,
-poor illumination / contrast
-a sudden increase
in close up work / monocular work
-poor health, pregnancy, trauma
- poor sensory fusion due to (unilateral cataract / anisometropia/ monovision in presbyopes(contraindicated in not well controlled phoria)

Question 5

Why do we need refractive correction as a management?

Answer 5

-achieve appropriate levels of accommodation and convergence
-Blurring makes fusion more difficult- correcting even small amount of Rx can improve binocular function

Question 6

How to modify RX for Myopia & SOP?

Answer 6

least possible minus for clear distance vision

Question 7

How to Modify the RX for Myopia & XOP?

Answer 7

Most minus but minimum over correction

Question 8

How would you modify the rx for Hyperopia & SOP

Answer 8

Max plus Rx without causing blur

Question 9

How would you modify rx for Hyperopia & XOP?

Answer 9

Consider partial correction