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Refractive errors occur when the light entering the eye is not clearly focused, causing blurry or unsharp vision. The main causes of refractive errors include hereditary factors and an unhealthy lifestyle. Signs and symptoms of refractive errors include blurred vision, frequent squinting to see objects clearly, and difficulty focusing when reading, watching TV, or looking at a gadget screen. This disorder cannot be completely cured, but it can be helped with glasses, contact lenses, or lasik surgery. The urgency of this research is driven by the increasing duration of gadget use among Ma Chung University students in June 2023  and its impact on eye refractive errors. The purpose of this study is to determine the effect of the duration of gadget use on refractive errors in students. The targeted output is empirical data on the relationship between the duration of gadget use and the incidence of refractive errors, which can be the basis for eye health interventions among students.

Refractive errors occur when the light entering the eye is not clearly focused, causing blurry or unsharp vision. The main causes of refractive errors include hereditary factors and an unhealthy lifestyle. Signs and symptoms of refractive errors include blurred vision, frequent squinting to see objects clearly, and difficulty focusing when reading, watching TV, or looking at a gadget screen. This disorder cannot be completely cured, but it can be helped with glasses, contact lenses, or lasik surgery. The urgency of this research is driven by the increasing duration of gadget use among Ma Chung University students in June 2023  and its impact on eye refractive errors. The purpose of this study is to determine the effect of the duration of gadget use on refractive errors in students. The targeted output is empirical data on the relationship between the duration of gadget use and the incidence of refractive errors, which can be the basis for eye health interventions among students.

Good lighting in a room is an important role that must be fulfilled to create a comfortable, functional and productive atmosphere. Inadequate lighting, such as lighting that is too dim or too bright, can cause eye fatigue, decreased productivity, and even health problems. In designing a room, lighting is also an important aspect that must be considered. Factors such as the type of activities performed in the room, the size of the room, and individual preferences can influence the selection of lamp types, light source placement, and optimal lighting settings.

  Infectious diseases are still an important public health problem, especially in developing countries. One of the mainstay drugs to overcome this problem is antibiotics. Bacterial resistance to antibiotics continues to increase throughout the world, including Indonesia. The purpose of this study was to determine the average use of antibiotic eye drops for the period January to March 2021 at the Community Eye Health Center January to March 2021. The method in this research is a descriptive survey. The population in this study were all prescription data from January to March at the Community Eye Health Center. Results In January to March 2021 the average number of uses of the antibiotic Levofloxacin was 39.6. Polynel is 35. Bralifex is 34.