private IshiharaResultFlag EvaluatePlateAnswers(IshiharaPlateReadLimits limits)
{
var count = AnswerList.Count(CompareNormalPlateReadCountToLimits(limits));
if (count >= limits.LowerLimitOfPass)
{
return(IshiharaResultFlag.NormalVision);
}
return(count <= limits.UpperLimitOfFail
? IshiharaResultFlag.ColorVisionDeficit
: IshiharaResultFlag.IndeterminantResult);
}
private static Func <IshiharaPlateAnswer, bool> CompareNormalPlateReadCountToLimits(
IshiharaPlateReadLimits ishiharaPlateReadLimits)
{
return(answer => answer.PlateRead == IshiharaAnswerResult.NormalVision &&
answer.PlateNumber <= ishiharaPlateReadLimits.SlidesToEvaluate);
}
