In the Quran at the time of death blurred vision is related to iron. Skeptics claim that whoever wrote the Quran made a mistake; iron has nothing to do with blurred vision. Today scientists confirm that at old age iron causes blurred vision.
Iron is essential for vision:
Iron contributes to the leading causes of vision loss
Iron is a necessary mineral for many of the body’s functions, including vision. But too much iron – or problems with utilizing, storing, or transporting iron properly – can lead to vision loss in the form of conditions such as age-related macular degeneration and hyperferritinemia syndrome, according to recent research findings.
Age-related macular degeneration (AMD) is regarded as the leading cause of vision loss for people over the age of 50. The macula, a small portion of the retina which is responsible for sharp and detailed vision, deteriorates over time when the retinal pigment epithelium (RPE) surrounding the macula oxidizes – triggering an inflammatory response.
Iron Disorders Institute, Iron contributes to the leading causes of vision loss, 2020
Above 50 the iron oxidizes (rusts) causing inflammation and blurred vision. This was known recently, however this was portrayed in the Quran 1400 years before it was discovered.
“You were in neglect of this, so We lifted your screen from you, and your vision today is iron.”
٢٢ لَقَدْ كُنْتَ فِي غَفْلَةٍ مِنْ هَٰذَا فَكَشَفْنَا عَنْكَ غِطَاءَكَ فَبَصَرُكَ الْيَوْمَ حَدِيدٌ
"Hadeed حَدِيدٌ" means iron. In this verse at the time of death blurred vision is related to iron. Today we know that at old age oxidized iron causes blurred vision.
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