This form is called Octain (Octain Refrain), invented by the great author Luke Prater.The form Structure –   eight lines as two tercets and a couplet, eight syllables per line with the first line repeated (as much as possible) as the last. Meter is iambic or trochaic tetrameter, but fine to just count eight syllables per line for those who prefer that.
Rhyme scheme -
A-b-b
a-c/c-a
b-A
(A = repeated refrain line. c/c refers to line five having mid line (internal) rhyme which is different to the a- and b-rhymes. Any extra mid line rhyme is a bonus)

“His Ignored Lifespan” (Octain)

He ignored his poisoned lifespan
Inviting the vertical glare,
the torments he denied to spare

And towards the unknown he ran.
His dream went blind; love ate his mind.
His fate’s retreat contrived the plan

Moments of scare, he liked to dare
He ignored his poisoned lifespan.

Written on 18th September,2011

©Munia Khan 2011

Published September 19, 2011

Philip
Well I tried a few of these Munia ...Yes I like this form . Thanks for the introduction . Philip

Dorothy A. Holmes apwlts2
Wonderful poem which I found necessary to read more than once...Thought provoking. Love the form. Dorothy A Poet Who Loves To Sing

Shashendra Amalshan
Very dark, profound poem that sends shivers through reader's mind. I kinda loved the cynicism and the dark imagery you used in this poem.

robyn selters
Very much the way it is for many in this tread-mill modern life... smart write with challenging format

Jenny Gordon
Interesting form. Serious topic and seemingly so applicable to modern society and the blind rat race. Excellent with wonderful imagery and visual image. Beautiful with a serious undertone of warning.

bruised-orange
profoundly written, both form and message. much enjoyed.

Philip
I do like this form dear Munia , I should like to try some !

Kesav V Easwaran
Nice poem, Munia...wonderful use of the poem structre...the internal rhyming adds more to the rhythm inside...line 5 reads really good- constitutes the soul of the write...liked