A “bionic eye” is a popular term for advanced technologies that aim to restore some sight using electronic or bioengineered systems. Most current examples are retinal or cortical implants that bypass damaged photoreceptors.
Technologies Described as Bionic Eyes
Devices may include epiretinal or subretinal implants, optic‑nerve or visual‑cortex stimulators, and experimental optogenetic or camera‑based systems. They all convert visual scenes into electrical patterns that stimulate the visual pathway.
- Intended mainly for people with profound vision loss from inherited retinal diseases
- Provide limited, pixelated vision rather than natural sight
- Require complex hardware, software, and surgery
- Often available only in research settings
Expectations
Despite media attention, bionic eyes currently offer functional vision for orientation and large‑object recognition rather than full restoration. Careful patient selection and rehabilitation are essential.
- Potential benefits must be weighed against surgical risks and device longevity
- Rapidly evolving research may improve performance over time
- Patients should be referred to tertiary centres for up‑to‑date trial options
- Conventional low‑vision strategies remain vital alongside emerging technologies
