Reframing Anterior Segment Depth: A Scoping Review Of Virtual Acd And Related Biometric Parameters For Elp Prediction.
Published 2026 - 44th Congress of the ESCRS
Reference: PP19.16 | Type: Free paper | DOI: 10.82333/2kkp-ds78
Authors: Mr Jose Galvez-Olortegui* 1 , Dr Isabel Silva-Ocas 2 , Dr Carmen Burgueño-Montañes 3 , Dr Tomas Galvez-Olortegui 4 , Dr Belen Alfonso-Bartolozzi 5 , Dr Jose F Alfonso 5
1Ophthalmology,Hospital del Oriente de Asturias,Arriondas,Spain, 2Ophthalmology,Hospital Nacional Alberto Sabogal Sologuren,Lima,Peru, 3Ophthalmology,Hospital Universitario Central de Asturias,Oviedo,Spain, 4Center of Excellence in Cornea, Cataract and Refractive Surgery,Clinica GO Visión,Lima,Peru, 5Fernández-Vega Ophthalmological Institute,Oviedo,Spain
Purpose
To map and standardize the terminology used to describe anterior segment biometric parameters related to postoperative anterior chamber depth (ACD)/ effective lens position (ELP) prediction and intraocular lens (IOL) position.
Setting
Clinical and imaging-based research in anterior segment biometry and cataract surgery.
Methods
A scoping review was conducted following PRISMA-ScR guidelines. Studies reporting definitions, preoperative and postoperative changes, or estimation models of anterior segment biometric parameters related to postoperative ACD or IOL position were included. Parameters were classified according to their anatomical reference into axial, horizontal and combined measurements. Changes from pre to postoperative measures were entered into a standardized evidence table. A qualitative comparative synthesis was used to identify standardized terminology, highlighting consistent findings across definitions.
Results
114 records were full text reviewed, and 42 selected for definitions(22) and definition(20). Definitions were classified in axial measurements(Table 1), horizontal measures (Table 2) and combined axial/horizontal measures(Table 3).
Substantial heterogeneity in terminology was identified: multiple definitions describing the same anatomical construct and different measurements sharing identical definitions. Conventional ACD showed marked postoperative deepening, whereas deep anterior segment parameters demonstrated minimal postoperative change. A proposed standardization of anterior segment biometric terminology is presented in Table 4, grouping heterogeneous terms under unified anatomical concepts, according to their reference landmarks.
Conclusions
Anterior segment biometric terminology related to postoperative ACD estimation is highly heterogeneous.
The concept of virtual anterior chamber depth provides a unifying and anatomically grounded framework to standardize existing measurements without introducing additional terminology.