From Far and Looking Across

How far can the human eye see?  I looked across the lake yesterday and saw sky rather than Toronto.  Is the following true? "The Earth's surface curves out of sight at a distance of 3.1 miles, or 5 kilometers. But our visual acuity extends far beyond the horizon. If Earth were flat, or if you were standing atop a mountain surveying a larger-than-usual patch of the planet, you could perceive bright lights hundreds of miles distant. On a dark night, you could even see a candle flame flickering up to 30 mi. (48 km) away". It comes from livescience.com     CLEVELAND – Scientists say it's a mirage, but others swear that when the weather is right, Clevelanders can see across Lake Erie and spot Canadian trees and buildings 50 miles away. Eyewitness accounts have long been part of the city's history. Jul 31, 2006.  This article is HERE.  I find out that you can see the Toronto Skyline from the Lake Ontario Shoreline in New York. I found a YouTube video of the Toronto skyline from New York State -  it was great as the lake waves were large and turbulent, so it looked like Toronto was sinking below the furious waves.  The distance is 30 miles. The distance from Niagara-on-the-Lake is 32 miles or 51 kilometres, so Toronto is often visible. And it is just a little farther to Grimsby at 55 kilometres or 34 miles.  Can we see Buffalo from Toronto?  I read that the answer is no - seems to me that is quite the distance.  Buffalo is 95 kilometres - 59 miles, so is much farther. Niagara Falls is visible from the CN Tower at 68 kilometres.  Of course, we've got the advantage of the height. Here's a post that shows Toronto from various locations across the lake.    My view across the lake yesterday at Flat Rock Cellars showed nothing at all - if one is looking for Toronto.  It shows the wonderful vineyards and the rusty shed down below.  So I've included a wonderful scene from the Watering Can in Vineland.