Portable Smartphone Adapter for Imaging the Anterior and Posterior Segments of the Eye

Abstract

Eye-related concerns are increasingly prevalent in emergency departments, but ophthalmologists are often not available in such settings. A quick and effective method for communicating eye concerns would aid in triage and allow for faster treatment in emergency departments.

TeleVision aims to improve ophthalmic diagnosis in emergency departments and resource-limited settings by developing a smartphone-compatible imaging device capable of capturing images of the anterior and posterior segments of the eye. These images will then be securely shared between medical personnel through HIPAA-compliant networks. The device’s core functionality centers on two independently designed optical systems optimized for each eye segment. While a single-lens design is ideal for simplicity, a multi-lens approach enables higher image quality through improved correction of artifacts, e.g., glare and shadow. Complementary components support system function, including mechanisms for switching between optical systems, adjusting focal length, and securely attaching the device to a variety of smartphones.

Currently, the selected architecture of the complementary components includes a fan-like lens-switching mechanism that transitions between anterior and posterior imaging. Lens positioning would be controlled by a voice-coil motor (VCM), enabling precise, low-power axial movement while preserving alignment with the smartphone camera. The device will mount to smartphones using a magnetic interface that provides reliable, repeatable positioning with minimal user setup. Dedicated lenses, integrated illumination, and a durable housing contribute to ergonomic handling and diagnostic image quality.

The device is designed for manufacturability, with structural components produced using straightforward methods, e.g., injection molding, and common materials, e.g., acrylonitrile butadiene styrene or polycarbonate. The simplified fan mechanism minimizes costs and assembly complexity. Standardized lens mounts, readily available VCMs, and low-cost N52 neodymium magnets further support scalable production. Major contributors include the VCM ($50–$200), optical elements ($20–$30), 3D printed or molded components ($8–$12), and magnets ($1–$2).

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