This study aims to evaluate the effectiveness of glasses-free 3D visual training in improving visual function, visual comfort, and the application ability of visual functions in individuals with presbyopia. The research will assess changes in brain activity related to visual processing using Electroencephalogram(EEG)and Functional near-infrared spectroscopy(NIRS) before and after the training. By examining the impact of stereoscopic stimulation on the functional connectivity of brain regions, the study seeks to provide new insights into the rehabilitation of presbyopia and its underlying mechanisms. The goal is to offer a non-invasive and scientifically supported approach to improving presbyopia treatment, potentially advancing clinical practices and contributing to brain science and ophthalmology
Age 40-60 years old, both sexes;
refractive error -6.0D to 5.0D, astigmatism <2.0D, anisometropia <4.0D;
binocular corrected visual acuity <0.2LogMAR;
stereoscopic threshold ≤100 ';
after lens replacement; People with cataracts, which affect vision, have other eye conditions such that simultaneous vision is not possible;
using any medication known to affect accommodative function or wearing orthokeratology lenses in the past 1 month;
patients with severe systemic disease or severe mental illness;
Other situations where the investigator considers that the subject should not participate in the study for safety reasons or the interests of the patient.
Parallel
glasses-free 3D visual training
Other interventionTrail group Conduct 15 minutes of naked-eye 3D vision training. Twice a day, five days a week. Control groups The subjects watched ordinary 2D videos for 15 minutes each time, all under the same lighting conditions. This was done twice a day, five days a week.
Amplitude of accommodation
The push-up method combined with negative lens method was used. The measurements were completed by a comprehensive refractometer. It was performed according to the methods in Clinical Procedures for Ocular Examination 4th
Asthenopia scale
The asthenopia scale consisted of 2 self-assessment items (" Do you have symptoms of asthenopia "and" does eye fatigue affect your study, work or life ") and 19 symptom items (" Do you feel discomfort around the eyes ")
Vergence facility
Vergence facility was tested using a lens flipper (3△BI/12△BO lens combination per eye) at 40cm with near correction
Accommodative convergence to accommodation(AC/A)
Accommodative response was measured by WAM-5500. Additional accommodative and vergence stimuli were provided by spherical lenses
The node efficiency
Electroencephalogram (EEG) was performed to track the electrical activity of the brain in real-time, and the node efficiency was calculated. Node efficiency is a metric that characterizes the efficiency of a single node in connecting with all other parts of the network. It reflects the centrality and importance of a node within the network.
Accommodative facility
Accommodative facility was tested using a lens flipper (+0.5D/-0.5 D lens combination) at 1m with distance correction
Refraction and addition(near correction)
In a semi-dark room, the Subjective Refraction and addition(ADD) measurements were performed. Thus, the subjects' near correction prescription were obtained
Near point of convergence
Near point of convergence was measured using push-up method with near correction
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