IMIE intelligent retina restores partial vision to a blind woman

Blind over a decade, a 61-year-old woman read E optotypes and walked indoors unaided after a 256-channel IMIE retinal implant in Changsha.

3ⓘ

AI system

System

IMIE intelligent retina (IMIE智能视网膜): 256-channel flexible epiretinal electrode array fixed on the macula, with camera glasses and an external video processing unit transmitting wirelessly to the implant

Model

Not assessed

Release

Exact release not established.

Application developer

Xiangya Hospital (Prof. Xu Huizhuo's team, per 2026 reports, which name no company); the IMIE 256 was co-developed by Golden Eye Bionics LLC (Pasadena) and IntelliMicro Medical Co., Ltd. (Changsha) and manufactured by IntelliMicro, per Xu et al. 2021

Role

Not assessed

Configuration

The participant’s retinal implant had 256 channels and followed the IMIE 256 device described in 2021.

Inputs and outputs

Not assessed

Autonomy

Not assessed

Workflow

Surviving retinal ganglion cells and optic nerve in end-stage retinitis pigmentosa, so that epiretinal stimulation can reach the visual cortex. A 256-channel flexible array fixed on the macula with 250-micrometer tacks and per-patient fitting of stimulation currents. Camera glasses and an external processor converting live video into stimulation patterns in real time. More than a month of structured visual rehabilitation after implantation. A surgical team with prior IMIE 256 experience (five implants reported in TVST 2021) and on-site guidance from Mark Humayun.

Human oversight

Not assessed

Relation to AI

The system is the whole substitute visual pathway. Camera glasses capture the scene. An external processor converts each frame in real time into stimulation patterns across 256 electrodes. The implant stimulates surviving ganglion cells whose signals reach the visual cortex. The patient had no vision before, so the benefit is attributable to the system together with structured rehabilitation. The 2026 reports describe the conversion only as an algorithm inside an “intelligent” retina. The 2021 IMIE 256 paper describes a video processing unit with a per-electrode threshold map and 15 gray levels and no learned model. How much of that processing is AI in a machine-learning sense is not established by these sources.

AI contribution

The IMIE system converted images from camera glasses into electrical stimulation through an implanted array. The patient also received rehabilitation to learn to use the resulting visual signals.

Benefits

Outcome identifiers

Not assessed

Benefit

she could identify E optotypes (acuity 0.03, peak 0.1)

Category

Improved Physical Health

Status

Not assessed

Beneficiary groups

People.

Beneficiaries

Not assessed

Reach

Not assessed

Distribution and access

Not assessed

Duration

Not assessed

Expected?

Yes

Costs and harms

Not assessed

Measurement

Studies

Not assessed

Study design

Not assessed

Measurement

Not assessed

Setting and sample

Not assessed

Measures

she could identify E optotypes (acuity 0.03, peak 0.1)

Comparison

Assumed alternative: international retinal prostheses of the same type with 60 channels

Results

Assumed comparison. Reference: 60 channels (international products of the same kind). Result: 256-channel flexible electrode array, with channel count and visual resolution reported as significantly superior.

Additional value from AI

Not assessed

Limitations

The cited technical paper describes processing that uses electrode thresholds and gray levels, without identifying a learned model. The later reports do not establish which part of the processing constitutes AI.

Denominators

Not assessed

Materials for replication

Not assessed

Money

Kind of value

Not assessed

Amount

Not assessed

Currency and prices

Not assessed

Period and unit

Not assessed

Realization

Not assessed

Recipients and payers

Not assessed

Gross or net

Not assessed

Included costs

Not assessed

Comparison

Not assessed

Method

Not assessed

Return and payback

Not assessed

People and places

Participants

Developer: Xiangya Hospital (Prof. Xu Huizhuo's team, per 2026 reports, which name no company); the IMIE 256 was co-developed by Golden Eye Bionics LLC (Pasadena) and IntelliMicro Medical Co., Ltd. (Changsha) and manufactured by IntelliMicro, per Xu et al. 2021. Operator: Xiangya Hospital, Central South University (Ophthalmology Center), in a Phase I clinical trial led by Prof. Xu Huizhuo.

Jurisdictions

Benefit: Changsha, China. Developer: China. Operator: China.

Ownership and control

Not assessed

Dependencies

Not assessed

Cross-border connections

Not assessed

Geopolitical implications

Not assessed

Follow-up

Conditions for replication

The implant stays positioned on the macula without serious complications. The 2021 series saw one array movement and one hypotony. Rehabilitation continues; the hospital's one-year observation period is still running. The reported acuity (0.03, peak 0.1) is phosphene vision, not natural sight. The hospital says the patient lacks full self-care ability.

Replication attempts

Not assessed

Later findings

The June 2026 reports mention plans to expand the subject range and move toward registration review, but no later development was found.

Availability

Not assessed

Institutional decision

Not assessed

Grounds

Not assessed

Action and result

Not assessed

Success criterion

Not assessed

Evidence

Source numbers

AIBD-0208-source-0001–0008

Citations

Numbered references below.

Language

Not assessed

Source relationships

Independent, Developer

Original evidence

Not assessed

Access and versions

Not assessed

Supported findings

Not assessed

Evidence strength

Not assessed

Missing evidence

Not assessed

Grades

Assessed benefits

People.

Depth

People: 3.

Reasons

People: One identifiable person, totally blind for more than ten years, regained enough vision to identify E optotypes (0.03, peak 0.1). She can walk indoors and through doorways without an escort. The hospital cautions that she does not yet have full self-care ability and needs long-term rehabilitation.

Observed or intended

Not assessed

Rubric

Not assessed

Assessor and date

Not assessed

Alternative assessments

Not assessed

Fill

Independently reported

Entry details

Kind

Not assessed

Field

Healthcare. Ophthalmology; retinal neuroprosthetics (invasive brain-computer interface).

Purpose

Built to restore partial sight to people blinded by photoreceptor degeneration by converting camera images into electrical stimulation of surviving retinal ganglion cells. The benefit recorded here is exactly that intended function.

Dates

Date basis unassessed: 2026 (precision unassessed). Updated: 22 October 2026.

Stage

Not assessed

Version

SHA-256: 59623807fb39…

References

Other identifiers

oecd_aim: 2026-06-06-09a2.

Category mappings

Not assessed

Brief

Not assessed

Revisions

6 revisions. Latest: 22 October 2026.

Sources

  1. Peer-reviewed study Developer

    Xu H, Zhong X, Pang C, Zou J, Chen W, Wang X, Li S, Hu Y, Sagan DS, Weiss PT, Yao Y, Xiang J, Dayan MS, Humayun MS, Tai YC (2021). First Human Results With the 256 Channel Intelligent Micro Implant Eye (IMIE 256). Translational Vision Science & Technology 10(10):14. doi:10.1167/tvst.10.10.14; PMID 34705041.

  2. News report Independent author

    Wang Haohao and Tan Lianlian, China Science Daily (2026). 全国首例！脑机接口智能视网膜让盲人看见字符 [China's first: brain-computer interface smart retina lets a blind person see characters]. ScienceNet, 8 June 2026.

  3. News report Independent author

    Tang Lu, Zhou Shun and Xiang Ying, Huasheng Online / Hunan Daily (2026). 国产IMIE智能视网膜临床试验取得重大突破 全盲患者术后重获光明 [Domestic IMIE intelligent retina trial achieves major breakthrough; totally blind patient regains light]. hunan.voc.com.cn, 7 June 2026.

  4. News report Independent author

    Yangcheng Evening News (2026). 中国首例！盲人凭脑机接口复明成功，实现自主行走 [China's first: blind person regains sight via brain-computer interface and walks independently]. Xinkuaibao (xkb.com.cn), 6 June 2026.

  5. News report Independent author

    Yan Shuo, 21st Century Business Herald (2026). 失明患者重见光明：脑机接口加速落地，行业迎来量产前夜 [Blind patient regains sight: brain-computer interfaces accelerate, industry on the eve of mass production]. 21jingji.com, 8 June 2026.

  6. News report Independent author

    Kuai Technology (2026). 国内首例盲人凭脑机接口复明成功 实测视力峰值可达0.1 [China's first blind person regains sight via brain-computer interface; measured peak acuity reaches 0.1]. 3DMGame, 6 June 2026.

  7. News report Independent author

    Red Net (2026). 盲人患者使用侵入式脑机接口复明 视觉功能初步重建 [Blind patient regains sight with invasive brain-computer interface; visual function preliminarily rebuilt]. China.com, 6 June 2026.

  8. News report Independent author

    Securities Times (2026). 脑机接口重塑失明治疗格局 美好医疗携手攻坚新赛道 [Brain-computer interfaces reshape blindness treatment; Meihao Medical joins the new track]. Phoenix Finance (ifeng.com), 8 June 2026.