Functional and Physiological Changes Induced by Pinhole Glasses in Presbyopia

Browse trials for

• Presbyopia 324

Keywords

• presbyopia

Presbyopia

324 studies on the registry are indexed under Presbyopia; 33 are open to participants now.

This study's planned enrollment of 40 is below the median of 61 across 265 interventional studies indexed under Presbyopia.

Lead sponsor

Chung-Ang University Hosptial, Chung-Ang University College of Medicine is the lead sponsor of 25 studies on the registry; none are open to participants now.

Study arms

• Experimental
  presbyopia

  All participants perform all exams under 3 conditions, that is baseline, with out pinhole glasses, and with multiple pinhole glasses

  Device: Trayner Pinhole Glasses (Trayner Glasses, Ivybridge Devon, U.K.)

Interventions

• DeviceTrayner Pinhole Glasses (Trayner Glasses, Ivybridge Devon, U.K.)

Primary outcomes

1. Distant visual acuity (logMAR)

   Distant visual acuity were measured using Snellen chart (Precision Vision, La Salle, IL, USA) at 4 m.

   Time frame: Subjects performed this examination while wearing multiple pinhole and without wearing pinhole with one week apart in random order after baseline study

2. BUT

   fluorescein is instilled into the subject's tear film and the subject is asked not to blink while the tear film is observed under a broad beam of cobalt blue illumination

   Time frame: Subjects performed this examination while wearing multiple pinhole and without wearing pinhole with one week apart in random order after baseline study

3. Near point of accommodation (NPA)

   Near point of accommodation (NPA) was measured using Donder's push-up method.

   Time frame: Subjects performed this examination while wearing multiple pinhole and without wearing pinhole with one week apart in random order after baseline study

4. The fusional convergence

   With the subject watching the 20/30 sized fixation target at 40 cm, we take the base-out bar prism on the subject's right eye. While gradually increasing the extent of the prism, the first point that the subject noticed diplopia was defined as the break point.

   Time frame: Subjects performed this examination while wearing multiple pinhole and without wearing pinhole with one week apart in random order after baseline study

5. Stereopsis

   Stereopsis was checked with the Randot Stereotest (Stereo Optical Co., Chicago, IL, USA).

   Time frame: Subjects performed this examination while wearing multiple pinhole and without wearing pinhole with one week apart in random order after baseline study

6. Reading speed (letters per second)

   Reading speed was evaluated using the famous Korean traditional fairy tale book. This Korean book was printed black-and-white with 10-font size.

   Time frame: Subjects performed this examination while wearing multiple pinhole and without wearing pinhole with one week apart in random order after baseline study

7. Photopic pupil size (baseline, mm)

   Pupil size under photopic conditions (85 cd/m2) was measured using a WASCA Analyzer (Carl Zeiss Meditec, Oberkochen, Germany).

   Time frame: Subjects performed this examination while wearing multiple pinhole and without wearing pinhole with one week apart in random order after baseline study

8. Pupil size with the one eye pinhole glasses (mm)

   Pupil size with the one eye pinhole glasses was measured using a WASCA Analyzer (Carl Zeiss Meditec, Oberkochen, Germany).

   Time frame: Subjects performed this examination while wearing multiple pinhole and without wearing pinhole with one week apart in random order after baseline study

Publications

• Park HH, Park IK, Moon NJ, Chun YS. Clinical feasibility of pinhole glasses in presbyopia. Eur J Ophthalmol. 2019 Mar;29(2):133-140. doi: 10.1177/1120672118810999. Epub 2018 Nov 21. PubMed 30460857 ↗