Vertical Deviations

Generally for vertical phoria, you are describing the deviation using the(hypo/hyper) eye

hyper eye

List the 6 common sx of vertical deviations

- HA

- eye strain

- diplopia

- motion/car sickness *

- poor attention

- loosing place when reading *

List the 2 best methods for measuring a vertical phoria

modified thorington

maddox rod

Describe diagnostic occlusion

24 hour monocular occlusion

occlude the non-dominant eye (can see if you can get anything after 1 hour).... take the patch off and o=cover the eye with an occluder so they don't fuse before you start CT

then start CT to find associated phoria

Infravergence is measured with (BU/BD)

BU

Infravergence is compensatory for a (hyper/hypo)deviation

hyperdeviation

Supravergence is measured with (BU/BD)

BD

Supravergence is compensatory for a (hyper/hypo)deviation

hypodeviation

(VT/prism) is the preferred tx method for vertical deviations

prism

_________________ is the most accurate and readily accepted method of prims correction for vertical deviations

associated phoria

What 2 methods can be used to find a starting point for prescribing prism

- associated phoria

- maddox rod

What is the Vertical Vergence Range equation

( BD to break - BU to break) / 2

BD = (+)

BU = (-)

Describe an induced vertical deviation

with high anisometropia, may be ortho at distance (looking through optical centers) and vertical phoria at near (looking through prism due to high Rx

What is the equation for Prentices Rule

diopteric power x cm of displacement from the optical center = induced prism

A px with plano OD and high plus OS would show what induced vertical phoria

left hyper

(eye will move down because looking through BU prism - so this will be interpreted as hyper deviation)

A px with plano OD and high minus OS would show what induced vertical phoria

left hypo

(eye will move up because looking through BD prism - so this will be interpreted as hypo deviation)

Hypo deviation is neutralize with what base of prism

BU

(T/F) No sx = no tx

TRUE

if no complaint related to vertical deviation - dont treat

How do you fix Induced Vertical Deviation

slab off

she is not testing on this concept in this course - just know thats how you fix it

At distance, there is an average of _____° of (in/ex)cyclophoria, and this can (decrease/increase) with convergence

0.752° excyclophoria

increase with convergence