October 8, 2011 | POSTED BY | Articles, Clinical Optometry
Tags: ,

Here are some really important figures and facts to remember in clinic when dealing with your pediatric patients. Try printing this out and keeping it in your lab coat!

1. DOSING MEDICATIONS

Dosing – (1 tsp = 5ml // 2.2 lbs=1kg)

Young’s Rule (based on age) —
Peds dose= Adult dose x age (years)/(age+12)

Clark’s Rule (based on weight) —
Peds dose= Adult dose x wt (lbs)/150

 

2. PATCHING

Patching regimen (suggested by Gregg) —
One hour per day per month of age up to a maximum of 8 hours per day until two years of age.

3. VISUAL ACUITY

Forced Preferential Looking to estimate VA’s of children. Diagnostic Stripe Widths to VA

1-2 MONTHS —40’—20/800
3 MONTHS    —30’— 20/600
4 MONTHS    —20’— 20/400
6 MONTHS     —5’—   20/100
9 MONTHS   —2.5’—  20/50

Operant Preferential Looking Stereoacuity Age Norms —

Age (months) Stereoacuity (seconds of arc)
18-23 250
24-29 225
30-35 125
36-53 100
54-65 60

 


4. AMBYLOGENIC REFRACTIVE ERROR

Refractive error most likely to bring about Amblyopia — 

 

Refractive Error Isometropia Anisometropia
Astigmatism >2.50D >1.50D
Hyperopia >5.00D >1.00D
Myopia >8.00D >3.00D


5. BIRTH WEIGHT

The most significant risk factor for visual anomalies in infancy is low birth weight —

Normal BW = 5.5 – 8.8 lbs (2500-3500 grams)
LBW = 3.3 – 5.4 lbs (1500-2499 grams)
VLBW = 2.2-3.2 lbs (1000-1499 grams)
ELBW = <2.2 lbs (<1000 grams)