Macular thickness and aging in retinitis pigmentosa

Area of Science:

• Ophthalmology
• Retinal Imaging
• Age-Related Macular Degeneration Research

Background:

• Retinitis pigmentosa (RP) is a group of inherited diseases that cause progressive vision loss.
• Macular tomography, measured by optical coherence tomography (OCT), is crucial for assessing retinal structure.
• Understanding age-related changes in macular thickness in RP is vital for patient management.

Purpose of the Study:

• To analyze macular tomography in retinitis pigmentosa (RP) patients across different age groups.
• To correlate macular thickness with visual function in RP patients.
• To investigate age-related variations in macular thickness using optical coherence tomography (OCT).

Main Methods:

• 75 RP patients and 75 controls were stratified into three age groups.
• Macular thickness was measured using optical coherence tomography (OCT) and analyzed in specific zones, quadrants, and areas.
• Comprehensive ophthalmic examinations assessed visual function, including visual acuity, visual fields, and color discrimination.

Main Results:

• Macular thickness decreased in middle-aged RP patients (45-55 years) and increased in the oldest group.
• The inner temporal area showed the most age-related fluctuation in thickness, while the outer inferior area remained stable.
• Foveal thickness was more critical for visual functions like electrooculography and visual acuity than inner or outer ring thickness.

Conclusions:

• Macular thickness in RP patients exhibits distinct age-dependent patterns: decreased in middle age, increased in older age.
• The inner temporal area is the most susceptible to age-related changes in RP, whereas the outer inferior area is the most resilient.
• Foveal thickness is a significant predictor of visual function in aging RP patients.