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Published on: February 15, 2022
Primary congenital glaucoma outcomes: lessons from 23 years of follow-up
Sophia L Zagora1, Charlotte L Funnell2, Frank J Martin3
1Discipline of Ophthalmology, University of Sydney, Sydney, NSW, Australia.
Insights
Early diagnosis of primary congenital glaucoma is crucial for visual outcomes, even with successful surgery. This study reveals critical ages around 2 and 5 years for potential glaucoma progression requiring further intervention.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Glaucoma Research
Background:
- Primary congenital glaucoma (PCG) is a rare but severe form of glaucoma.
- Early diagnosis and intervention are critical for preserving vision in affected children.
- Understanding the long-term impact of surgical timing and success is essential for optimizing patient care.
Purpose of the Study:
- To investigate the influence of presentation age on surgical success in primary congenital glaucoma.
- To determine the extent of angle surgery required for glaucoma control.
- To identify critical age periods for potential glaucoma progression necessitating further surgical management.
Main Methods:
- Retrospective cohort study analyzing 192 procedures on 117 eyes (70 patients) over 23 years.
- Surgical success defined by stable intraocular pressure and optic disc appearance.
- Analysis of age at presentation, number of angle procedures, and final visual acuity.
Main Results:
- 75.5% of angle surgeries were successful, with long-term success rates decreasing over time.
- Children diagnosed before 3 months had poorer visual outcomes (<20/200) despite controlled glaucoma.
- Presentation age and number of operations did not significantly impact surgical success.
Conclusions:
- Early presentation (<3 months) in PCG is associated with poor visual outcomes, irrespective of surgical success.
- Age of presentation does not influence the success of angle surgery.
- Critical ages for potential glaucoma progression and need for further surgery identified around 2 and 5 years.
Purpose:
To determine in primary congenital glaucoma whether age of presentation influences surgical success, the degrees of angle surgery needed to achieve glaucoma control, and whether there are critical ages where glaucoma progresses, requiring further surgical management.
Design:
Retrospective cohort study.
Methods:
The medical records of patients with primary congenital glaucoma over a 23-year period were reviewed: 192 procedures were performed on 117 eyes (70 patients). The number and age of angle procedures and final visual acuity was analyzed. Surgical success was defined as stable intraocular pressure and optic disc appearance.
Results:
Procedures involving 83 of the 110 eyes (75.5%) undergoing angle surgery were successful, with 2-, 4-, 6-, and 10-year success rates of 92%, 86%, 84%, and 75%, respectively. Subgroup analysis (<3 months; 3-6 months; >6 months) comparing age of diagnosis to visual outcome (<20/200, 20/200-20/40, >20/40) was significant (P = .04). The age at first operation (P = .94), the number of angle operations (P = .43), and their effect on angle surgery success was not significant. Seven of 192 operations were performed after the age of 8 years (3.6%). After the initial angle surgeries within the first year of life, the third procedure occurred at a median age of 2.4 years (interquartile ratio [IQR] 0.6-3.8 years) and the fourth procedure occurred at a median age of 5.3 years (IQR 2.5-6.1 years).
Conclusions:
Children diagnosed at <3 months of age had a visual outcome of <20/200 despite successful glaucoma control. Age of presentation did not affect surgical success. A total of 78.9% of cases undergoing primary trabeculotomy were controlled with 1 operation: 4 clock hours of angle (120 degrees). Analysis of glaucoma progression suggests critical ages where further glaucoma surgery is required at around 2 and 5 years of age.
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