Accessing Jhanas 1-4 via Eye Focus

You're right, there are a lot of different ideas on Jhana. Check out Kenneth's "brotherhood of the BMX" idea to make yourself very confused

kennethfolkdharma.wetpaint.com/page/Q+%2...ration+Meditation%29

The bottom line is Jhana occurs with a sliding scale of concentration. The good news is you don't need super hard jhanas to make progress.