Misdirected aqueous flow in rhegmatogenous retinal detachment: a pathophysiology update

Area of Science:

• Ophthalmology
• Retinal Diseases
• Fluid Dynamics in the Eye

Background:

• Current theories attribute subretinal fluid in rhegmatogenous retinal detachment (RRD) to vitreous humor.
• Posterior vitreous detachment (PVD) and retinal tears are often explained by vitreoretinal traction, intraocular currents, collagen fiber contraction, and gravity.
• These existing explanations are considered incomplete for fully understanding RRD pathogenesis.

Purpose of the Study:

• To present a novel synthesis of experimental and clinical evidence regarding RRD.
• To update the understanding of the fundamental pathophysiological processes involved in RRD.
• To propose misdirected aqueous humor flow as a primary mechanism in RRD.

Main Methods:

• Review and synthesis of existing experimental and clinical evidence.
• Analysis of pathophysiological processes in rhegmatogenous retinal detachment.
• Correlation of aqueous humor dynamics with clinical manifestations of RRD.

Main Results:

• Misdirected aqueous humor flow provides a more convincing explanation for the origin of subretinal fluid in clinical RRD.
• Misdirected aqueous humor flow is identified as the most probable cause of acute PVD and retinal tear formation.
• This aqueous flow also contributes to the initial detachment of the retina at the tear site.

Conclusions:

• Misdirected aqueous humor flow is a key pathophysiological process in RRD.
• This process occurs independently of anterior chamber shallowing or acute glaucoma, differentiating it from "aqueous misdirection syndrome".
• The findings necessitate a revision of the current understanding of RRD etiology, emphasizing the role of aqueous humor dynamics.