[Physiological side differences in fluorescein inflow into eyes (author's transl)]

Area of Science:

• Ophthalmology
• Vascular Biology
• Medical Imaging

Background:

• Assessing ocular circulation is crucial for diagnosing various eye conditions.
• Previous methods using sequential angiography introduced variability due to systemic changes.
• Simultaneous bilateral imaging offers a more reliable comparison of ocular hemodynamics.

Purpose of the Study:

• To compare dye inflow patterns between the two eyes using simultaneous bilateral fluorescein angiography.
• To identify reliable indicators of unilateral circulatory disturbances in the eye.
• To evaluate the diagnostic utility of filling patterns in different ocular vessels.

Main Methods:

• Rapid-sequence fluorescein angiography performed concurrently on both eyes of 241 healthy subjects.
• Analysis of arm-fundus transit time and filling patterns of choroid and retina.
• Assessment of filling patterns in cilioretinal arteries.

Main Results:

• Over 90% of subjects showed no significant side differences in arm-fundus time or choroid/retinal filling.
• Transient, single-exposure differences were observed in a small percentage, normalizing quickly.
• Significant, persistent side differences in inflow patterns strongly suggest unilateral vascular disturbances.
• Cilioretinal artery filling patterns exhibited high variability and frequent side differences, limiting diagnostic value.

Conclusions:

• Simultaneous bilateral fluorescein angiography effectively eliminates variability from sequential studies.
• Persistent side differences in fluorescein inflow patterns are highly suggestive of cervical, retinal, or choroidal vascular pathology.
• Cilioretinal artery filling patterns are not reliable for diagnosing unilateral circulatory disturbances due to inherent variability.