As an AI, I do not have personal preferences or physical capabilities to engage in activities like hiking. However, I can provide information and tips on hiking in the mountains if you are interested. **

If your glasses fog up while mountain climbing, you can try a few different solutions. One option is to adjust your glasses to sit further away from your face to allow for better airflow. You can also try using anti-fog wipes or sprays specifically designed for glasses. Another option is to use a small amount of dish soap or shaving cream on the lenses, then gently wipe it off to create a fog-resistant barrier. **

Reading glasses and distance glasses serve different purposes. Reading glasses are designed to help with close-up tasks like reading or using a computer, while distance glasses are meant to correct vision for objects that are far away. The lenses in reading glasses are typically magnified to help with close-up vision, whereas distance glasses have lenses that are designed to correct refractive errors for distance vision. While both types of glasses are used to improve vision, they are not interchangeable due to their specific functions. **

'Play glasses' typically refer to glasses that have been designed to enhance the experience of playing video games or watching movies. These glasses often have features such as blue light blocking lenses to reduce eye strain, anti-glare coatings to improve visibility, and a comfortable design for long periods of use. They can be a helpful accessory for individuals who spend extended periods of time in front of screens and want to protect their eyes. **

Not always. Some people wear glasses only for specific activities, such as reading or using the computer, while others wear them all the time. It depends on the individual's vision needs and preferences. Some people may also choose to wear contact lenses instead of glasses. **

Yes, it is possible to wear 3D glasses over regular glasses. However, it may not be the most comfortable option as it can be bulky and may not fit securely on top of your regular glasses. Some 3D glasses are designed to fit over regular glasses, while others may not accommodate them well. It is recommended to try them on together to see if they fit comfortably before using them for an extended period. **

Glasses can smear when cleaned with glasses cleaning cloths due to the presence of oils, dirt, or residue on the lenses. If the cloth is not clean or if it has been used multiple times without washing, it can transfer these substances onto the glasses, causing smudges. To prevent smearing, ensure the cleaning cloth is clean and free of debris before use, and consider using a specialized lens cleaning solution for a more thorough clean. **

To wear cycling glasses over regular glasses, you can look for cycling glasses that are designed to fit over prescription glasses. These are often called "fit over" or "OTG" (over the glasses) cycling glasses. They are designed with extra space in the frame and lenses to accommodate regular glasses underneath. Another option is to choose cycling glasses with larger frames and lenses that can fit over your regular glasses without pressing against them. It's important to ensure a comfortable fit and good visibility when wearing cycling glasses over regular glasses to ensure safety and comfort while riding. **