A joint pose for eyes is fairly easy, because you don't need to include the affectors for the head.  Here's a sample, trimmed down from a .cr2.  You may not actually need the smoothScale information.

{
version
    {
    number 5
    }
actor rightEye:1
    {
    channels
        {
        smoothScaleY head_smooY
            {
            name head_scaleY
            initValue 0
            hidden 1
            forceLimits 0
            min -100000
            max 100000
            trackingScale 1
            keys
                {
                static  0
                k  0  0
                }
            interpStyleLocked 0
            smoothZones 0.679025 0.689348 99 100
            otherActor head:1
            flipped
            calcWeights
            }
        }
    origin -0.013 0.662 0.03
    endPoint -0.013 0.662 0.037
    orientation 0 0 0
    }
actor leftEye:1
    {
    channels
        {
        smoothScaleY head_smooY
            {
            name head_scaleY
            initValue 0
            hidden 1
            forceLimits 0
            min -100000
            max 100000
            trackingScale 1
            keys
                {
                static  0
                k  0  0
                }
            interpStyleLocked 0
            smoothZones 0.687287 0.700101 99 100
            otherActor head:1
            flipped
            calcWeights
            }
        }
    origin 0.013 0.662 0.03
    endPoint 0.013 0.662 0.037
    orientation 0 0 0
    }
}

===========================sigline======================================================

Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.