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Longitudinal Measurements of Visual Diet in Children (VEET)

9 juni 2026 uppdaterad av: Xiaoying Zhu, OD, PhD, MD, MS, FAAO, State University of New York College of Optometry

Myopia is a leading cause of visual impairment worldwide, with prevalence rising rapidly among children. Growing evidence suggests that environmental and behavioral factors play a dominant role in ocular growth; however, current studies typically isolate single components of the visual environment, such as near work or light intensity, limiting investigators' understanding of how multiple visual stimuli interact within individuals over time. The retina is continuously exposed to a dynamic "visual diet," encompassing viewing distance, illuminance, spectral composition of light, and temporal viewing patterns, as well as associated visuomotor responses such as eye vergence and pupil dynamics. A critical barrier to myopia prevention is the lack of longitudinal, quantitative measurements that integrate these factors in real-world settings during childhood ocular development.

The long-term goal of this project is to prevent myopia onset and slow myopia progression through individualized, patient-centered monitoring and modification of the visual diet. The overall objective of this proposal is to longitudinally characterize visual diet and visuomotor behavior in children and to identify the most influential environmental and physiological factors driving myopia onset and progression. The investigators will conduct a 3-year longitudinal observational study enrolling 60 children aged 7-12 years, including myopic children and non-myopic children stratified by risk of myopia progression.

Studieöversikt

Status

Rekrytering

Betingelser

Detaljerad beskrivning

Visual stimulation plays a critical role in guiding eye growth through activity dependent mechanisms. To date, this visual stimulation or visual diet has been investigated by measuring isolated components including near work, light intensity, or wavelength across different individuals. However, this approach does not address how multiple components of the visual diet interact in the visual development of each individual child. Knowledge gap: There is an urgent need for longitudinal measurements from individual children that incorporate multiple components of the visual environment and visual function as the eye grows and develops. This proposal addresses this gap by measuring longitudinally children's visual diet using a combination of techniques that will record these multiple components with VEET (Visual Environment Evaluation Tool, Meta Reality labs), modern eye tracking, refraction, and biometry. The understanding of the interactions between the visual environment and visual function will allow us to develop more effective approaches for myopia prevention and control.

One major reason that visual diets remain under-investigated is the lack of appropriate technology. The investigators propose to use the novel VEET to measure spectral irradiance, illuminance, viewing distance, and head motion. In addition, the investigators propose to use modern wearable eye tracking to quantify visuomotor response during reading. The investigators' long-term goal is to prevent myopia onset and slow myopia progression in children through an individualized, patient-centered approach that monitors and modifies the visual diet. The specific objective of this proposal is to identify what individual features of the visual diet have the strongest impact on myopia development, and provide specific guidelines to monitor and modify them accordingly in an individualized manner.

Studietyp

Observationell

Inskrivning (Beräknad)

60

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

  • Namn: Xiaoying Zhu, OD, PhD, MD, MS, FAAO
  • Telefonnummer: 212-838-5541
  • E-post: xzhu@sunyopt.edu

Studera Kontakt Backup

  • Namn: Jingyun Wang, PhD, FAAO
  • Telefonnummer: 212-938-5759
  • E-post: jwang@sunyopt.edu

Studieorter

  • Förenta staterna
    • New York
      • New York, New York, Förenta staterna, 10036
        • Rekrytering
        • SUNY College of Optometry
        • Kontakt:

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Barn

Tar emot friska volontärer

Ja

Testmetod

Sannolikhetsprov

Studera befolkning

Participants will be selected from the Pediatric Clinic at the College and from the local community.

Beskrivning

Inclusion Criteria:

  • Age: 7-12 years old (inclusive)
  • Astigmatism of < 1.50D
  • Stereopsis equal or better 100 seconds of arc
  • Normal binocular functions.

In addition, for the Myopic group:

- Cycloplegic autorefraction (spherical equivalent, SEQ) between -0.50D and -6.00D, who are not currently pursuing nor intending to start myopia control at the time of enrollment.

For the non-myopic group:

- SEQ between plano and +2.50D.

Exclusion Criteria for both groups:

  • History of refractive surgery or myopia control
  • Binocular abnormalities
  • Ocular and systemic pathologies
  • Developmental delay
  • Unable to wear the VEET at home for 8 days every 6 months for 3 years
  • Pre-term birth (< 34 weeks of gestational age).

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

Kohorter och interventioner

Grupp / Kohort
Myopic group
Children with myopia
Control
Children without myopia

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Refractive error (D)
Tidsram: From enrollment to the end of the 3-year study, every 6 months
Measured with an autorefractor
From enrollment to the end of the 3-year study, every 6 months
Axial length (mm)
Tidsram: From enrollment to the end of the 3-year study, every 6 months
Measured with a biometer
From enrollment to the end of the 3-year study, every 6 months
Viewing distance (cm)
Tidsram: From enrollment to the end of the 3-year study, every 6 months

Measured using the Visual Environment Evaluation Tool (VEET). VEET contains multiple time-of-flight (ToF) infrared sensors embedded in the temple arms of the glasses.The sensors emit infrared light toward objects in front of the wearer.

The device measures the time required for the reflected infrared light to return to the sensor. Using the speed of light, the system calculates the distance between the eye/glasses and the viewed object.
From enrollment to the end of the 3-year study, every 6 months
Illuminance (lux)
Tidsram: From enrollment to the end of the 3-year study, every 6 months
Measured with the Visual Environment Evaluation Tool (VEET). VEET uses photometric light sensors that detect the light intensity. The sensors convert incoming light into electrical signals proportional to brightness, and the device reports illuminance in lux, the standard unit for light exposure.
From enrollment to the end of the 3-year study, every 6 months
Wavelength of the environmental light (nm)
Tidsram: From enrollment to the end of the 3-year study, every 6 months
Measured with the Visual Environment Evaluation Tool (VEET). The VEET measures light wavelength using integrated spectral light sensors that analyze the composition of incoming light across different portions of the visible spectrum. Rather than only measuring brightness (illuminance), the device also characterizes the spectral distribution of light reaching the wearer.
From enrollment to the end of the 3-year study, every 6 months
Eye vergence (degree)
Tidsram: From enrollment to the end of the 3-year study, every 6 months

Using an eye tracker (Pupil Labs). Pupil Labs eye trackers measure eye vergence by tracking the gaze direction of both eyes separately and then calculating the angle between the two visual axes.

Vergence refers to the inward or outward rotation of the eyes when focusing at different viewing distances:

Convergence → eyes rotate inward for near targets Divergence → eyes rotate outward for distant targets

Pupil Labs estimates vergence using these steps:

  1. Track each eye independently
  2. Estimate each eye's gaze vector in 3D
  3. Compute where the two gaze vectors intersect
  4. Calculate the vergence angle between them
From enrollment to the end of the 3-year study, every 6 months
Pupil size (mm)
Tidsram: From enrollment to the end of the 3-year study, every 6 months
Using an eye tracker (Pupil Labs). Eye trackers measure pupil size using infrared video imaging and computer vision algorithms that detect the pupil boundary in images captured by eye-facing cameras. The eye tracker shines infrared (IR) light onto the eye using tiny IR LEDs. Infrared light is invisible to the user and produces stable illumination conditions for imaging the pupil. Small cameras pointed at the eyes continuously record high-speed grayscale images of the eye. The pupil appears darker than surrounding structures when using the "dark pupil" technique commonly used in wearable eye trackers. Finally, computer vision algorithms analyze each frame to locate the pupil region, identify the pupil edge, and fit a geometric shape to detect the pupil size in mm.
From enrollment to the end of the 3-year study, every 6 months

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Height (cm)
Tidsram: From enrollment to the end of the 3-year study, every 6 months
Using a stadiometer.
From enrollment to the end of the 3-year study, every 6 months
Arm length (cm)
Tidsram: From enrollment to the end of the 3-year study, every 6 months
Measured using a tape measure.
From enrollment to the end of the 3-year study, every 6 months
Accommodative facility
Tidsram: From enrollment to the end of the 3-year study, every 6 months
Using +/- 2.00 D flippers
From enrollment to the end of the 3-year study, every 6 months

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

State University of New York College of Optometry

Utredare

  • Huvudutredare: Xiaoying Zhu, OD, PhD, MD, MS, FAAO, State University of New York College of Optometry

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

8 juni 2026

Primärt slutförande (Beräknad)

1 juni 2031

Avslutad studie (Beräknad)

1 juni 2031

Studieregistreringsdatum

Först inskickad

4 juni 2026

Först inskickad som uppfyllde QC-kriterierna

9 juni 2026

Första postat (Faktisk)

11 juni 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

11 juni 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

9 juni 2026

Senast verifierad

1 juni 2026

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • IRBNET ID 2300010
  • Pending (Annat bidrag/finansieringsnummer: National Institutes of Allery and Infectious Diseases)

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

NEJ

Läkemedels- och apparatinformation, studiedokument

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Nej

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