The young human eye can change focus from distance (infinity) to 6.7 cm from the eye in 350 milliseconds. This dramatic change in focal power of the eye of approximately 15 dioptres (the reciprocal of focal length in metres) occurs as a consequence of a reduction in zonular tension induced by ciliary muscle contraction. The amplitude of accommodation declines with age.
Singapore's close proximity to the equator means that its temperature and humidity remain relatively even throughout the year. Its average daytime temperatures are around 87 degrees Fahrenheit, varying only slightly between annual high temperatures of 90 degrees and low temperatures of 84 degrees.The hottest weather occurs in April. High humidity is a constant in Singapore, with an average relative humidity level of around 84 percent.On rainy days, the relative humidity remains at around 100 percent.ingapore's close proximity to the equator means that its temperature and humidity remain relatively even throughout the year. Its average daytime temperatures are around 87 degrees Fahrenheit, varying only slightly between annual high temperatures of 90 degrees and low temperatures of 84 degrees.
Singapore has a tropical rainforest climate with that is always hot and humid with lot of rains. Temperatures during day time drift continuously around 30Â°C, while night time temperature drops below 23Â°C and the high humidity makes this uncomfortable; tropical conditions take some time to acclimatise to.ingapore weather is not mostly sunny due to the regular rainfall and cloudy conditions which are caused by pollution and smoke. With almost no seasonal differences Singapore experiences a tropical rainforest climate, which remains hot, humid always.