Dry eye is an age-related disease characterized by tear film instability and ocular discomfort.Its onset is closely related to various factors such as age and environment.Studies have shown that oxidative stress plays a key role in the pathogenesis of dry eyes.This review mainly describes the mechanism of oxidative stress by activating autophagy,in-flammation and aging to induce dry eyes,and the application progress of the antioxidants from natural foods in relieving the oxidative stress state of the ocular surface and treating dry eyes.

Objective:To construct a psychological support training program for palliative care specialist nurses based on positive psychology theory and make a preliminary application.Methods:From August to September, 2020, 142 palliative nursing specialist nurses in Hunan Provincial Palliative Nursing Specialist Training Base were selected as the research objects. Based on positive psychology therapy, using literature review and analysis, semi-structured interviews, expert group meetings and other methods to construct the program, and the work stress, psychological resilience and subjective well-being scores of nurses before and after 8 weeks of psychological support training were compared.Results:The program included three dimensions: cognition, emotion and behavior. After the psychological support training for 8 weeks, the nursing staff′s work stress score 80.76 ± 20.43 was lower than that before the psychological support training 84.70 ± 19.88, the difference was statistically significant( t=6.59, P<0.05), and the psychological resilience score 64.40 ±14.26 was higher than that before the psychological support training 60.19 ±15.85, the difference was statistically significant ( t=-7.39, P<0.05), and the subjective well-being score 75.70 ± 7.70 was higher than that before the psychological support training 74.13 ± 5.98, the difference was statistically significant ( t=-3.52, P<0.05). Conclusions:The psychological support training program based on positive psychology theory can reduce the the work stress, improve psychological resilience and increase subjective well-being of palliative care specialist nurses.

Cataract is a common eye disease caused by metabolic disorders of the lens, which can lead to visual impairment or blindness. Its occurrence and development are affected by various factors, among which age is the most important factor. At present, drug therapy only has a delaying effect on early cataracts, but surgical treatment is still needed for cataracts that affect vision in the middle and late stages. Therefore, it is crucial to establish an experimental cataract model and explore appropriate drugs for preventing and treating cataracts. D-galactose has been widely used in the study of aging animal models, and is often used in the models of diabetes cataract and age-related cataract. This article elaborates on the pathogenesis, modeling methods, and evaluation criteria for successful modeling of D-galactose-induced cataract models, in order to guide experimental researches related to cataract prevention and treatment.