medical decision support medical decision support
Sign In

Risk Factor Count of Cummins et al for Development of Glaucoma in a Patient with Ocular Hypertension

Description

Certain risk factors are associated with development of visual field defects in patients with ocular hypertension. Cummins et al developed a risk factor count which measured these factors.


 

Risk factors:

(1) age

(2) family history

(3) intraocular pressure

(4) cup-to-disc ratio

 

Parameter

Finding

Points

age

< 60 years of age

0

 

>= 60 years of age

1

family history

negative for glaucoma

0

 

positive for glaucoma

1

intraocular pressure

<= 28 mm Hg

0

 

> 28 mm Hg

1

cup-to-disc ratio

> 0.5

1

 

interocular difference > 0.2

1

 

neither

0

 

where:

• cup-to-disc ratio = (diameter of optic nerve cup) / (diameter of optic nerve disc)

• interocular difference = ABS((left eye cup-to-disc ratio) – (right eye cup-to-disc ratio))

 

risk factor count =

= SUM(points for the 4 parameters)

 

Interpretation:

• minimum count: 0

• maximum count: 4

• The higher the count, the greater the risk for developing visual field defects.

• Patients with risk factors for developing visual field defects should be screened frequently to detect early changes.

 


To read more or access our algorithms and calculators, please log in or register.

Specialty