Joan was April's French teacher at Girls' College and they've remained in close contact for years.
"We (Mike and I) were both up at Four Seasons, she turned up, because that was her interest, and we acted together," says Joan.
It was Chris McKenzie, who is now directing Blind Eye, who suggested that April might have had Joan in mind when she wrote the part of Vera.
Joan is not sure what to make of that.
"An elderly lady about to start dementia … incontinent and blind …"
Playing a blind woman is challenging, says Joan.
"Not being able to see, or not being allowed to see where people are on the stage, or where chairs are, that's hard."
"You look at people when they talk to you," says Mike. "It has been a challenge, simple as that."
When Mike and Joan operated River City Players, they produced five plays, four of which were written by April Phillips. They were comedies.
"There is humour in Blind Eye but it is unintentional," says Mike.
Joan says the play is so well written, so strong, so forceful (Mike's description), that people have wept just reading the script.
"It's heart-rending in a way," says Mike. "It's a good, strong story-line.
"There are just four characters, so there's no bit part. All four are integral characters."
Blind Eye is on at Amdram Theatre from February 4-13.