"Expensive gifts uncouth" means that giving lavish or extravagant gifts is considered inappropriate or rude. It suggests that the act of giving expensive gifts may be seen as lacking in taste or refinement, and may even be perceived as trying too hard to impress or show off. It implies that there is a certain level of social grace and humility in giving more modest or thoughtful gifts rather than flashy or ostentatious ones. **

The decision between wearing prescription sunglasses or contact lenses depends on your personal preferences and lifestyle. If you prefer the convenience of not having to switch between glasses and sunglasses, contact lenses may be a better option. However, if you have sensitive eyes or prefer not to wear contact lenses, prescription sunglasses can provide protection from the sun while correcting your vision. It's best to consult with your eye care provider to determine which option is most suitable for your needs. **

Optical glasses can be converted into sunglasses by adding tinted lenses to the frames. These tinted lenses can be either prescription or non-prescription, depending on the wearer's needs. The tinted lenses can provide UV protection and reduce glare, making them suitable for outdoor activities. Some optical shops offer the option to customize existing frames with tinted lenses, allowing for a seamless transition from regular glasses to sunglasses. **

Polarized lenses in sunglasses are designed to reduce glare from surfaces such as water, snow, and roads. They contain a special filter that blocks intense reflected light, allowing only vertical light to pass through. This helps to enhance visibility and reduce eye strain, making them particularly useful for outdoor activities such as driving, fishing, and skiing. Polarized lenses are also effective in reducing the harmful effects of UV rays, providing added protection for the eyes. **

Words like "Pisse" or "scheißen" are introduced as vulgar in the Duden because they are considered to be crude or offensive in the German language. The Duden, as a reputable German dictionary, aims to reflect the standard language use and societal norms. The determination of what is considered vulgar or uncouth in the Duden is based on linguistic experts, language scholars, and societal perceptions of appropriateness in language. **

The main difference between daily, monthly, and yearly contact lenses is their replacement schedule. Daily contact lenses are designed to be worn once and then discarded, making them convenient and hygienic. Monthly contact lenses are meant to be worn for up to 30 days before being replaced, while yearly contact lenses can be worn for up to a year with proper care and cleaning. Each type of contact lens has its own advantages and considerations, such as cost, convenience, and maintenance requirements. **

Polarized lenses in sunglasses are specially designed to reduce glare from surfaces such as water, snow, and glass. They contain a special filter that blocks intense reflected light, allowing only vertical light to pass through. This helps to improve visibility, reduce eye strain, and enhance contrast and clarity, making them ideal for activities such as driving, fishing, and skiing. **

Yes, regular lenses can be inserted into sunglasses as long as they are the correct size and shape to fit the frames. This can be done by an optician or eyewear professional who can custom cut the lenses to fit the sunglasses. However, it's important to note that regular lenses may not provide the same level of UV protection as lenses specifically designed for sunglasses. **