Monocular and binocular reading performance in children with microstrabismic amblyopia

Area of Science:

• Ophthalmology
• Pediatric Vision
• Reading Neuroscience

Background:

• Microstrabismic amblyopia affects visual development in children.
• Assessing functional reading deficits is crucial for understanding the impact of amblyopia.
• Standardized reading tests allow for objective measurement of reading performance.

Purpose of the Study:

• To determine if children with microstrabismic amblyopia exhibit functionally relevant reading deficits.
• To compare monocular and binocular reading performance in amblyopic children versus normal-sighted controls.

Main Methods:

• Evaluated reading acuity and speed in 40 children (20 with amblyopia, 20 controls) using standardized charts.
• Reading performance was assessed monocularly and binocularly in a randomized order.
• Participant groups were age-matched, with defined visual acuity parameters for amblyopic and control eyes.

Main Results:

• Children with microstrabismic amblyopia showed significantly lower binocular maximum reading speed (MRS) (172.9 wpm) compared to controls (200.4 wpm).
• No significant differences were observed in binocular visual acuity or reading acuity between the groups.
• Monocular reading performance was impaired in amblyopic eyes, but fellow eyes did not differ from controls.

Conclusions:

• Microstrabismic amblyopia is associated with a functionally relevant impairment in binocular reading speed.
• This reading impairment is present even when binocular visual and reading acuities appear normal.
• Findings highlight the importance of assessing reading speed beyond basic visual acuity measures in amblyopic children.