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OpenTrials
Completed

NCT Number: NCT03024073

Assessment of Near Vision Capacity in Different Light Intensities

Patients who underwent presbyopic correction with bilateral bifocal intraocular lenses implantation are supposed to have sufficient uncorrected vision capacity for activities of daily living (ADLs) that require near vision acuity (NV), (ie. book reading). However, it is known that light intensity and temperature has a great impact on near vision capacity. Primary objective of this study is to identify the optimal task lighting conditions (in terms of light intensity and temperature) for ADLs that demand near vision acuity for a sample oa patients who underwent presbyopic correction with bilateral bifocal intraocular lenses implantation

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Key information

Conditions

Presbyopia Eye Diseases Refractive Errors

Age range

45 year–65 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Democritus University of Thrace

Alexandroupoli, Evros, 68100, Greece

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Presbyopia

Exclusion criteria

  • Glaucoma
  • Corneal pathology
  • Fundus pathology
  • Severe neurological/mental diseases that interfere with visual acuity

Treatment and study plan

BB-Phaco

Procedure

Phacoemulsification with bilateral bifocal lenses implantation

Primary outcomes

  1. Uncorrected Near Vision Acuity (UnVA)

    Time frame: 6 months

    Near Vision Acuity

Secondary outcomes

  1. Near Vision Capacity (NVC)

    Time frame: 6 months

    NVC score will be measured by the performance score in the following ADLs: a) cellular phone directory entry search, b) reading of message in a cellular phone, c) reading a medical prescription, d) reading a public phonebook

Sponsors and collaborators

Lead sponsor

Democritus University of Thrace

Other

Registry information

Official study title

Assessment of Near Vision Capacity in Different Light Intensities and Temperatures in Patients Who Underwent Pseudophakic Presbyopic Correction

Important dates

Study start
2017
Primary completion
2018
Study completion
2018
First posted
Jan 18, 2017
Registry last updated
Jul 25, 2019

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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