Ultrasound Biomicroscopy Study Of Accommodative State In Smartphone Abusers

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT03389009

Enrollment

Registered

2018-01-03

Start date

2016-10-01

Completion date

2018-12-30

Last updated

2021-08-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Spasm of Accommodation

Brief summary

Detection if there is association between spasm of accommodation and smart phone abuse by ultrasound biomicroscopy on anterior segment of the eye

Interventions

DIAGNOSTIC_TESTUltrasound Biomicroscopy of anterior segment of the eye

5150 Vumax (Sonomed, USA) under standard illumination

Study design

Observational model

OTHER

Time perspective

CROSS_SECTIONAL

Eligibility

Sex/Gender

ALL

Age

18 Years to 35 Years

Healthy volunteers

Yes

Inclusion criteria

1. Age 18 - 35 year. 2. Smart phone excessive use. 3. Emmetrope and myope patients.

Exclusion criteria

1. Hypermetrope patients. 2. Any form of tropia. 3. Anterior segment diseases either congenital or acquired. 4. Previous intraocular surgeries. 5. Presbyopic subjects. 6. Drugs induced spasm of accommodation: psychiatric drugs, pilocarpine, physostigmine, echothiophate, prostigmine, isoflurophate, muscarine, digitalis overdose and with sulphonamides 7. CNS diseases : Neurosyphilis, Raeder paratrigeminal neuralgia syndrome, cyclic oculomotor palsy, pineal tumor, Chiari malformation, pituitary tumor, metabolic encephalopathy,

Design outcomes

Primary

Measure	Time frame	Description
Difference in objective refraction measured before and after cycloplegia	40-60 minutes after instillation of cycloplegic drop	diopter

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026