i am a B.Sc comp.sc, working as COBOL programmer in india. i have Presbyopia [cant see near things]. I found concept of 'adjustable glasses' so seductive, it w

i am a B.Sc comp.sc, working as COBOL programmer in india. i have Presbyopia [cant see near things]. I found concept of 'adjustable glasses' so seductive, it was instant 'i want it' i bought an eyejuster 3 mths ago. paid US$40. whooping amount for me. the glasses are UTTERLY completely useless. absolute utter crap. here's why - if i turn the wheel and focus them for reading a book nr the kbd, and then if i turn my head to see the monitor - bam! complete utter white-out. cant see anything. out of focus. and then if i lift my head to find my coffee mug - Bam ! utter white-out. cant see a damm thing. total out of focus dont buy the damm things. its VERY seductive in theory. but totally utterly broken in practice. an unmitigated $40 disaster. [somewhat like the Nice thermostats PG commented on recently]