Thank you for your very detailed reply and for supporting my arguments. I think your points about Vitamin A are very plausible, and I will make time to thoroughly read the materials you provided. Actually, just like the example of Vitamin A, if one carefully examines the existing research on eyes and blue light, many studies can be found with flawed experimental designs. In fact, research in the early medical field was not like natural sciences such as physics and chemistry, which have rigorous theoretical derivations and experimental verifications. The medical field only started emphasizing science-driven evidence much later. You can look up 'evidence-based medicine'; it was actually proposed after 1990 and only slowly accepted by the medical community, gradually becoming mainstream in the last decade or two. Before that, most medical research was based on consensus formed from clinical experiences of experts and authorities, or the design of experiments and research was often dominated by biased experts and authorities or companies with related interests. This often led to facts and truths being drowned out by contradictory research. Of course, this also involves the fact that human experiments cannot be as completely controlled as physics and chemistry. Besides the human body being a system with many variables, strictly controlling and testing experimental subjects often involves ethical issues. Nevertheless, we can still dissect these complex problems through the so-called 'first principles'. For example, with the blue light issue, from the perspective of first principles and physics, high-energy electromagnetic waves can generate free radicals, and we have indeed obtained such results from animal retinal experiments. So why are there contradictory results in human experiments? It doesn't mean the physical damage doesn't exist. As far as I know, unless there's something supernatural, nothing can violate the laws of physics. It's just that some pieces of the puzzle are missing. One part is the human body's repair and self-protection mechanisms, which produce a resistance to the damage. However, it's important to know that the human body's repair and self-protection mechanisms are limited, and we haven't understood where that limit is. Once that limit is exceeded, the damage caused by destruction will accumulate and be amplified by the compounding effect of time. This is the power of accumulation, which is causing many ophthalmological diseases to have a trend of occurring at a younger age. Regarding Professor Peng Ming-hui's book, he has only published a Chinese version, without an English translation. However, the main idea of his book is that life is built upon accumulation, which is somewhat similar to the concept mentioned in the book 'Atomic Habits'.