Chromatic vision and structural assessment in primary congenital glaucoma

Area of Science:

• Ophthalmology
• Pediatric Medicine
• Genetics

Background:

• Primary congenital glaucoma (PCG) is a rare, early-onset condition impacting vision in infants.
• Assessing visual function, particularly color vision, in pediatric glaucoma patients presents unique challenges.
• Limited research exists on color vision abnormalities in children diagnosed with PCG.

Purpose of the Study:

• To evaluate color vision discrimination in children with PCG using the Farnsworth D-15 test.
• To assess the relationship between color vision performance and retinal nerve fiber layer (RNFL) thickness in pediatric glaucoma.
• To identify factors influencing color vision deficits in this population.

Main Methods:

• A cross-sectional study involving 13 children (21 eyes) diagnosed with PCG.
• Color vision was assessed using the Farnsworth D-15 test.
• Retinal fiber layer thickness was measured using spectral domain optical coherence tomography (SD-OCT).
• Data on age, visual acuity, cup-to-disc ratio, and spherical equivalent were collected.

Main Results:

• 19% of eyes (4 out of 21) failed the Farnsworth D-15 test, exhibiting diffuse dyschromatopsia.
• Age was the only statistically significant factor associated with color vision test performance.
• No significant differences in global or sectional RNFL thickness were observed between children who passed or failed the color vision test.

Conclusions:

• The Farnsworth D-15 test may offer insights into visual function in pediatric PCG.
• Current findings suggest color vision deficits in PCG may not directly correlate with RNFL thinning.
• Further research is warranted to explore the link between color vision abnormalities and structural retinal damage in pediatric glaucoma.