Related Experiment Video
Updated: Jul 13, 2026

The Goeckerman Regimen for the Treatment of Moderate to Severe Psoriasis
Published on: July 11, 2013
Effects of coal dust contiguity on xerophthalmia development
Zhaoyi Sun1, Jing Hong, Deqin Yang
1Department of Ophthalmology, the First Affiliated Hospital of China Medical University, Shenyang 110001, China. zhaoyisun77@sina.com
Purposes:
To study the occurrence of ocular surface diseases on coal miners working under wells and to investigate the relation between xerophthalmia occurrence and coal dust contiguity.
Methods:
To observe the influence of coal dust to ocular surface by using Schirmer to detect lacrimal gland secreting function, and breakup time of tear film (BUT) to evaluate the stability of lacrimal film and the quantity of lysozyme in lacrimal fluid.
Results:
These values were lower for underground coal miners than other workers not contacting coal dust, and showed negative correlation to period of their services.
Conclusions:
Conditions in coal miners were worse than that of other workers. Coal dust exposure plays an important role in the development of dry eye.
Related Concept Videos
Chronic Obstructive Pulmonary Disease I: Introduction
Chronic Obstructive Pulmonary Disease
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features
Photoreceptors and Visual Pathways
Chronic Obstructive Pulmonary Disease-III: Symptoms and Complications.
Symptoms of COPD can be classified as primary or systemic. Primary symptoms relate to reduced airflow, while systemic or extrapulmonary symptoms relate to COPD's broader impact on the body.
Primary Symptoms of COPD:
Chronic Obstructive Pulmonary Disease-II: Pathophysiology
Chronic Inflammation

