Not long ago I collaborated with a lensball provider, Refractique. One of my photographs taken with the lens ball is focused on their website. This website - http://refractique.com/ - gives a great overview on refraction in photography; and there is an extract defining refraction below. Their website is highly recommended. Other images are on Refractique's Facebook site.
Lensballs are not expensive but are a great accessory for your photography allowing experimentation and application of refraction techniques to generate interesting 3D effects.
You may also follow Refractique on Instagram at https://www.instagram.com/refractique/
Minimalism is one of my favourite photographic genres. It is characterised by simplicity and lack of clutter amongst other things. It is considered to be a very subjective concept, leaving meaning up to the viewer's interpretation of the photography.
The first photograph, Red Door below, was the cover page of the December 2017 Free Expressions publication on Contemporary Photography of the Australian Photographic Society. The other photos are entitled Flying Alone, Green Chair and Solitary respectively.
Australian Photography Magazine has a monthly Best Shot competition. This month, July had a theme of Looking Down. My photograph "From Way Up" received a Highly Commended.