Related Experiment Video
Updated: Apr 15, 2026
09:17
Using Retinal Imaging to Study Dementia
Published on: November 6, 2017
22.5K
Changes in retinal oxygen saturation, choroidal thickness, and retinal nerve fibre layer
Shaolin Du1, Xinbo Gao1, Xiulan Zhang1
1Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-Sen University, Guangzhou, China.
Summary
Trabeculectomy for acute primary angle closure (APAC) improved retinal oxygen saturation and altered vessel diameter and choroidal thickness within one month post-surgery. These changes suggest a gradual recovery from APAC, though further research into its pathophysiology is warranted.
Area of Science:
- Ophthalmology
- Glaucoma Research
- Retinal Physiology
Background:
- Acute primary angle closure (APAC) is a serious condition requiring prompt intervention.
- Trabeculectomy is a surgical procedure used to manage APAC.
- Understanding the physiological changes post-surgery is crucial for assessing recovery.
Purpose of the Study:
- To evaluate changes in retinal oxygen saturation (Sat O2), choroidal thickness (CT), and retinal nerve fibre layer (RNFL) after trabeculectomy for APAC.
- To assess the recovery trajectory of ocular parameters following APAC surgery.
Main Methods:
- A prospective, longitudinal study involving 23 eyes with trabeculectomy-required APAC.
- Retinal oximetry, choroidal thickness, and RNFL measurements were taken on postoperative day 1 and at 1 month.
- Paired t-tests and Pearson correlation analyses were employed.
Main Results:
- Retinal arteriolar oxygen saturation (Sat O2) significantly increased from postoperative day 1 to 1 month (p=0.049).
- Mean choroidal thickness (CT) decreased significantly by 1 month post-surgery (p=0.002).
- Arteriolar and venular diameters showed statistically significant changes between the two time points (p=0.044 and p=0.027, respectively). RNFL showed no significant difference.
Conclusions:
- Post-trabeculectomy changes in Sat O2, CT, and vessel diameter indicate a gradual recovery process in eyes with APAC.
- The findings suggest that trabeculectomy effectively addresses some of the acute physiological disturbances caused by APAC.
- Further investigation into the diverse pathophysiologies of APAC is necessary.
