Measuring How Quickly the Eye Focuses After Sustained Viewing of Close-up Images and Videos
A Randomized, Repeated-measures Study to Measure the Temporal Frequency Response of Ocular Accommodation After Sustained Near Viewing.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Benjamin M Chin, Doctorate
- Telefonnummer: 8454534320
- E-mail: bmccis@rit.edu
Studiesteder
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New York
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Rochester, New York, Forenede Stater, 14623
- Rekruttering
- Chester F. Carlson Center for Imaging Science
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Kontakt:
- Benjamin M Chin, Doctorate
- Telefonnummer: 8454534320
- E-mail: bmccis@rit.edu
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- Between 18-35 years of age
- Normal or corrected-to-normal (glasses/contact lenses) vision.
Exclusion Criteria:
- Vision worse than 20/20 while wearing glasses / contact lenses.
- Fragile or loose teeth (participants need to bite a piece of dental clay to stabilize their heads so that measurements can be taken from their eyes)
- Current pregnancy (experiment requires sitting down without moving for stretches of time)
- Heart disease
- Personal/familial history of epilepsy
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Eksperimentel: Near viewing first first
In a given session of the experiment (1.5 hours), participants do 2 sets of accommodation tasks.
One task happens after viewing a screen for 20 minutes at 25cm, and the other task happens after looking at a distant object (10m) for 20 minutes.
There are two types of sessions: one in which the screen is viewed first ('near viewing first'), and the other in which the distant object is viewed first ('distant viewing first').
All participants do both sessions.
However, in one arm, participants do the 'near viewing first' session first.
|
In a given session of the experiment (1.5 hours), participants do 2 sets of accommodation tasks.
One task happens after viewing a screen for 20 minutes at 25cm, and the other task happens after looking at a distant object (10m) for 20 minutes.
In one intervention, the session is structured such that the screen is viewed first ('near viewing first').
In a given session of the experiment (1.5 hours), participants do 2 sets of accommodation tasks.
One task happens after viewing a screen for 20 minutes at 25cm, and the other task happens after looking at a distant object (10m) for 20 minutes.
In one intervention, the session is structured such that the distant object is viewed first ('distant viewing first').
|
|
Eksperimentel: 'Distant viewing first' first
In a given session of the experiment (1.5 hours), participants do 2 sets of accommodation tasks.
One task happens after viewing a screen for 20 minutes at 25cm, and the other task happens after looking at a distant object (10m) for 20 minutes.
There are two types of sessions: one in which the screen is viewed first ('near viewing first'), and the other in which the distant object is viewed first ('distant viewing first').
All participants do both sessions.
However, in one arm, participants do the 'distant viewing first' session first.
|
In a given session of the experiment (1.5 hours), participants do 2 sets of accommodation tasks.
One task happens after viewing a screen for 20 minutes at 25cm, and the other task happens after looking at a distant object (10m) for 20 minutes.
In one intervention, the session is structured such that the screen is viewed first ('near viewing first').
In a given session of the experiment (1.5 hours), participants do 2 sets of accommodation tasks.
One task happens after viewing a screen for 20 minutes at 25cm, and the other task happens after looking at a distant object (10m) for 20 minutes.
In one intervention, the session is structured such that the distant object is viewed first ('distant viewing first').
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Gain and phase of ocular accommodation
Tidsramme: Each measurement takes 10 seconds. In the experiment, the investigators will take measurements over the course of approximately 1 hour.
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Ocular accommodation is the focusing response of the lens in the eye.
When the stimulus viewed by the participant changes in distance, the eye automatically refocuses.
The investigators measure this refocusing using a device called a wavefront sensor.
The investigators are particularly interested in the gain of accommodation, which is the ratio of the amplitude of accommodation to the amplitude of sinusoidal changes in stimulus distance.
The investigators are also interested in the phase of the accommodative response, which is related to the lag of the accommodative response.
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Each measurement takes 10 seconds. In the experiment, the investigators will take measurements over the course of approximately 1 hour.
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Samarbejdspartnere
Samarbejdspartnere
Efterforskere
Efterforskere
- Ledende efterforsker: Benjamin M Chin, Doctorate, Rochester Institute of Technology
Datoer for undersøgelser
Studer store datoer
Studiestart (Anslået)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- IRB0000131-Exp2
- 4R00EY036497-03 (U.S. NIH-bevilling/kontrakt)
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
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