老视俗称"老花""老花眼"，是指随着年龄增长，眼睛睫状肌力量减弱、晶状体硬化，导致眼睛调节力出 现生理性衰退，从而出现近距离用眼问题的一种现象。生活中，人们对于老视还存在一些误区，如"戴 老花镜后，度数会越来越高""老花眼突然减轻是眼睛好了"等。下面，我们带您逐一了解真相。 您是否有过这样的经历：举着手机，让它逐渐远离自己的视线，手臂越伸越长；看书时喜欢背景灯光更 亮一些，或是把原来配戴的近视眼镜取下来，凑近点才能看得清晰、舒服？上述情况，其实是眼睛向我 们发出的一个视觉信号——老视。 真相 老视是生理性老化，目前无法"治愈"或逆转。所有矫正手段都是为了"补偿"眼睛失去的调节能力，让其 相对舒适使用，提高生活质量。任何宣称能"根治"老视的方法都是不科学的。 误区2：近视的人不会出现老视 真相 近视和老视是两种不同的视力问题，二者之间并无直接的因果关系。近视的人同样会出现老视，只不过 在近距离用眼时，其近视度数（负镜）部分抵消了老视度数（正镜），可以不用戴眼镜就看清楚；但 是，在看远处时，近视者同样需要戴近视眼镜。 误区3：随便买个老花镜就行 真相 老花镜需根据个人视力需求、近用距离及瞳距等参数进行定制。随意购 ...

视频里，眼科医生表示，儿子安安是远视引起的弱视，还存在一个屈光参差。 本文转自【羊城晚报】； 12月20日，朱丹分享视频聊起了家中两个娃都弱视的话题。此事也冲上了热搜。 朱丹在视频里表示，现在每隔三个月或是半年就要带孩子们来医院复查一下眼睛，女儿念念和儿子安安都是一个问题，先后被查出弱视，不过情 况不严重，都在恢复中。 因为发现干预得早，朱丹女儿现在基本矫正成功了，后续继续戴眼镜维持就行了。而儿子安安大概需要到7、8岁才可能稳定下来。 朱丹在视频里建议家长在孩子过了3岁以后，也到专业眼科医院，给孩子做一个精细的眼科检查。"其实矫正非常简单，孩子也没有痛苦，一方面 就是配一副眼镜，另外就是贴眼贴，把好的眼睛贴起来，强迫不好的眼睛去用眼。" 朱丹表示，她的女儿念念率先发现有弱视问题。当时她女儿所在的幼儿园和某眼科机构有合作，给小朋友做眼睛检查，之后朱丹就收到了老师信 息，说女儿眼睛数据不太好，建议去专业的眼科医院，之后就被查出了弱视了。 当时，朱丹就被医生科普，其实小朋友在3周岁以后，应该做一个全面的眼科检查。朱丹表示，念念是4周岁多发现的问题，所以儿子一到3周岁 就被带去检查，结果发现了同样的问题。 朱丹回忆俩 ...

Core Insights - Presbyopia is a common visual issue that arises with aging, characterized by difficulty focusing on close objects due to decreased elasticity of the lens and reduced muscle adjustment ability [2][3] Group 1: Prevalence and Causes - A report indicates that 56.9% of the population aged 35 and above in China experiences presbyopia, which is exacerbated by increased screen time and close-up work [4] - The development of presbyopia is linked to the natural aging process, where the ciliary muscle's ability to adjust diminishes and the lens loses its elasticity [3] Group 2: Progression of Presbyopia - The degree of presbyopia typically increases with age, generally deepening by 50 degrees every five years. For instance, at age 45, the degree is usually around 100 degrees, increasing to 200 degrees by age 55, and reaching 250 to 300 degrees by age 60 [5] Group 3: Nearsightedness and Presbyopia - Nearsightedness and presbyopia are distinct conditions that do not counteract each other. Nearsightedness results from the eye's shape, while presbyopia is a physiological aging phenomenon [5][6] Group 4: Eyewear Solutions - It is advised to avoid purchasing ready-made reading glasses without proper fitting, as they may not meet individual needs. A professional eye exam is recommended to determine the correct prescription [7] - For individuals with both presbyopia and nearsightedness, suitable eyewear options include: - Bifocal lenses, which have distinct sections for distance and near vision [9] - Progressive lenses, which provide a gradual transition between different focal lengths without visible lines [9] - Single vision lenses used in combination for specific tasks, such as prolonged screen time [9]

Group 1 - The article defines myopia levels: low myopia is classified as 50 to 300 degrees, with 50 to 100 degrees being the lower range of low myopia [1] - For individuals with a naked eye vision of 0.8 or above, it is suggested to avoid glasses temporarily if daily activities, such as viewing a blackboard, are not affected, but vision should be rechecked every three months [1] - Moderate myopia ranges from 300 to 600 degrees, while high myopia is classified as over 600 degrees [1] Group 2 - Doctors recommend that individuals with moderate to high myopia wear frame glasses throughout the day to prevent eye strain caused by blurred vision, which can lead to excessive eye axis elongation and increased myopia [1]

Group 1 - The term "biodegradable plastics" can mislead consumers into thinking they can be discarded without consequences, while their degradation requires specific conditions that are often not met in natural environments [1][2] - Many biodegradable plastics decompose slowly in natural settings, potentially leading to microplastic pollution, thus emphasizing the need for proper recycling and waste management [2] - A circular economy approach, focusing on reducing plastic use and enhancing recycling, is suggested as a more effective solution to plastic pollution [2] Group 2 - Osteoporosis patients are often advised to limit physical activity to prevent fractures, but appropriate exercise is essential for maintaining bone and muscle health [3] - Regular movement can help prevent the loss of bone density and muscle mass, which are critical for reducing the risk of falls in the elderly [3] - Adequate sunlight exposure is necessary for vitamin D synthesis, which is vital for bone health, highlighting the importance of balanced activity levels [3] Group 3 - The claim that covering oneself with blankets during a fever helps reduce temperature is incorrect; it can actually hinder the body's natural cooling process [4] - Maintaining a comfortable room temperature and staying hydrated are recommended practices during a fever [4] - If fever persists or is accompanied by severe symptoms, seeking medical attention is advised [4] Group 4 - The asteroid "2024 YR4" has a calculated collision probability with Earth of approximately 2%, with its size estimated between 40 to 90 meters [5][6] - The probability of collision has increased from 1% to 2.3% based on ongoing observations, indicating that such probabilities can change rapidly as more data is collected [5][6] - International cooperation has established protocols for monitoring and responding to near-Earth objects, ensuring preparedness for potential threats [6] Group 5 - The belief that wearing glasses worsens nearsightedness is unfounded; nearsightedness progression is linked to eye development and usage habits [7] - Timely use of corrective lenses is crucial for children diagnosed with myopia to prevent further deterioration of vision [7] - Encouraging outdoor activities and proper eye care can help mitigate the progression of nearsightedness [7] Group 6 - The assertion that fish oil can lower blood lipids is oversimplified; while Omega-3 fatty acids in fish oil can help reduce triglycerides, they do not significantly affect cholesterol levels [8][9] - High-purity fish oil is recommended for individuals with elevated triglycerides, but it should not replace statin medications for cholesterol management [10] - The effectiveness of fish oil supplements varies based on their purity and the specific fatty acid content, necessitating careful selection [9][10] Group 7 - The notion that allergy medications should only be taken after symptoms appear is misleading; proactive treatment can be more effective in managing seasonal allergies [11] - Preventive measures, such as using nasal sprays or eye drops before allergy season, can significantly reduce the severity of symptoms [11] - Early intervention is emphasized to improve outcomes for individuals with known allergies [11] Group 8 - The claim that NFC technology in smartphones is insecure and can lead to unauthorized transactions is incorrect; NFC requires close proximity and user authentication to function [12][13] - NFC technology operates similarly to RFID, allowing secure data exchange within a limited range, enhancing its safety for mobile payments [12][13] - Concerns about unauthorized transactions are more related to user behavior and security practices than the technology itself [14]