Revolutionary Contact Lenses Monitoring Eye Pressure Changes for Early Glaucoma Diagnosis

Innovative Contact Lenses Monitor Eye Pressure for Early Glaucoma Detection

Researchers have introduced groundbreaking contact lenses equipped with embedded sensors designed to measure intraocular pressure (IOP) and transmit data to ophthalmologists for evaluation. This innovation aims to facilitate early detection of glaucoma, a condition that can lead to irreversible vision loss if left untreated.

Glaucoma arises from damage to the optic nerve, connecting the eye to the brain, due to increased IOP, often caused by fluid build-up in the eye. The challenge with glaucoma lies in its gradual development, earning it the nickname 'silent thief of sight.' By the time routine eye tests identify the condition, irreversible harm may have already occurred.

A collaborative effort between researchers from Northumbria University in the UK and Boğaziçi University, Turkey, led to the development of contact lenses capable of detecting IOP fluctuations. These lenses, named Glako Lens, use embedded electrically passive sensors in a disposable soft contact lens made of polydimethylsiloxane (PDMS). Data is wirelessly collected by a wearable electronic readout system, which then processes and transmits the information to an ophthalmologist for analysis.

Compared to traditional eye exams, Glako Lens offers the advantage of easily taking IOP measurements over an extended period, leading to more accurate diagnoses. Hamdi Torun, the corresponding author of the study, highlighted the importance of monitoring IOP continuously for a comprehensive understanding of eye health. Traditional methods often involve single-day clinic visits, potentially providing misleading results due to natural IOP variations.

The contact lenses were tested on six healthy volunteers, demonstrating their responsiveness to changes in IOP caused by intentional water loading. Participants wore the lens on their left eye, while IOP in the right eye was measured without the lens for comparison. The study's findings confirmed that the contact lens sensors effectively responded to water loading effects, with measurements aligning closely with those taken from the right eye.

While Glako Lens is not the first attempt at developing glaucoma-detecting contact lenses, its electrically passive sensor and soft lens aim to enhance comfort and flexibility for wearers. Previous lenses often incorporated electrically active silicon chips, resulting in thicker, less comfortable lenses that could restrict vision.

The researchers envision broader applications for their technology, suggesting that the lenses could potentially detect other health conditions by measuring molecules like glucose and lactic acid present in the eye.

The study, published in the journal Contact Lens and Anterior Eye, indicates promising prospects for Glako Lens. The lenses are expected to be commercially available through the spin-off company Glako Lens.

Source: Northumbria University

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