You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: calcAccommodation.m
    path of file: ./repos/gkaModelEye/model/calc
    
    the code of the file until where you have to start completion: function accommodation = calcAccommodation(eye,fieldAngularPosition,angleReferenceCoord,rayIntersectionHeight,effectiveInfinity,cameraMedium)
% Returns the accommodative state of the eye for a field location
%
% Syntax:
%  accommodation = calcAccommodation(eye,fieldAngularPosition,angleReferenceCoord,rayIntersectionHeight,effectiveInfinity,cameraMedium)
%
% Description
%   The accommodative state of the eye is specified in units of diopters,
%   where the reciprocal of this value gives the distance from the
%   object focal point to the first principal point of the optical system.
%
%   By default, the calculation is performed for an object space location
%   on the longitudinal axis of the optical system. An alternative is to
%   select a fieldAngularPosition and angleReferenceCoord corresponding to
%   the location of (e.g.) the fovea w.r.t. the approximate incident node
%   of the eye. This would be a specification of a field location in visual
%   angle. Note that visual field angle is defined w.r.t. a fixed value for
%   the approximate indcident node, which is calculated and stored for the
%   model eye with a lens accommodation setting that would place an
%   emmetropic eye focused at infinity.

%
% Inputs:
%   eye                   - Structure. SEE: modelEyeParameters
%   fieldAngularPosition  - 2x1 vector that provides the coordinates of the
%                           origin of the nodal ray in [horizontal,
%                           vertical[ degrees with respect to the
%                           coordinate specified in referenceCoord.
%   angleReferenceCoord   - 3x1 vector that provides the coordinate from
%                           which the field angles are calculated. The
%                           incident node is a typical choice. If not
%                           defined, is set to [0;0;0], which is the origin
%                           coordinate on the longitudinal axis.
%   rayIntersectionHeight - Scalar. The divergent rays will arrive at the
%                           corneal apex separated by 2x this value.
%   effectiveInfinity     - Scalar. Rays arising from this point or beyond
%                           will be treated as parallel.
%   cameraMedium          - String. The medium in which the eye is located.
%                           Defaults to 'air'.
%
% Outputs:
%   accommodation         - Scalar. The accommodative state (in diopters)
%                           of the eye w.r.t the specified field position.
%
% Examples:
%{
    % Test that we can create and recover a specified accommodation to a
    % point on the longitudinal axis
    desiredAccommodation = 4;
    eye = modelEyeParameters('accommodation',desiredAccommodation);
    measuredAccommodation = calcAccommodation(eye);
    assert(abs(desiredAccommodation-measuredAccommodation)<5e-3)
%}
%{
    % Test that we can create and recover a specified accommodation for the
    % fovea. We first measure the approximation to the incident nodal point
    % in this eye with a navarroD value of zero. We then retain this

    
function accommodation = calcAccommodation(eye,fieldAngularPosition,angleReferenceCoord,rayIntersectionHeight,effectiveInfinity,cameraMedium)
% Returns the accommodative state of the eye for a field location
%
% Syntax:
%  accommodation = calcAccommodation(eye,fieldAngularPosition,angleReferenceCoord,rayIntersectionHeight,effectiveInfinity,cameraMedium)
%
% Description
%   The accommodative state of the eye is specified in units of diopters,
%   where the reciprocal of this value gives the distance from the
%   object focal point to the first principal point of the optical system.
%
%   By default, the calculation is performed for an object space location
%   on the longitudinal axis of the optical system. An alternative is to
%   select a fieldAngularPosition and angleReferenceCoord corresponding to
%   the location of (e.g.) the fovea w.r.t. the approximate incident node
%   of the eye. This would be a specification of a field location in visual
%   angle. Note that visual field angle is defined w.r.t. a fixed value for
%   the approximate indcident node, which is calculated and stored for the
%   model eye with a lens accommodation setting that would place an
%   emmetropic eye focused at infinity.

%
% Inputs:
%   eye                   - Structure. SEE: modelEyeParameters
%   fieldAngularPosition  - 2x1 vector that provides the coordinates of the
%                           origin of the nodal ray in [horizontal,
%                           vertical[ degrees with respect to the
%                           coordinate specified in referenceCoord.
%   angleReferenceCoord   - 3x1 vector that provides the coordinate from
%                           which the field angles are calculated. The
%                           incident node is a typical choice. If not
%                           defined, is set to [0;0;0], which is the origin
%                           coordinate on the longitudinal axis.
%   rayIntersectionHeight - Scalar. The divergent rays will arrive at the
%                           corneal apex separated by 2x this value.
%   effectiveInfinity     - Scalar. Rays arising from this point or beyond
%                           will be treated as parallel.
%   cameraMedium          - String. The medium in which the eye is located.
%                           Defaults to 'air'.
%
% Outputs:
%   accommodation         - Scalar. The accommodative state (in diopters)
%                           of the eye w.r.t the specified field position.
%
% Examples:
%{
    % Test that we can create and recover a specified accommodation to a
    % point on the longitudinal axis
    desiredAccommodation = 4;
    eye = modelEyeParameters('accommodation',desiredAccommodation);
    measuredAccommodation = calcAccommodation(eye);
    assert(abs(desiredAccommodation-measuredAccommodation)<5e-3)
%}
%{
    % Test that we can create and recover a specified accommodation for the
    % fovea. We first measure the approximation to the incident nodal point
    % in this eye with a navarroD value of zero. We then retain this
    % landmark to define visual field position.
    eye = modelEyeParameters('navarroD',0);
    angleReferenceCoord = eye.landmarks.incidentNode.coords;
    fieldAngularPosition = eye.landmarks.fovea.degField;
    desiredAccommodation = 4;
    navarroD = calcNavarroD(eye,desiredAccommodation,fieldAngularPosition,angleReferenceCoord);
    eye = modelEyeParameters('navarroD',navarroD);
    measuredAccommodation = calcAccommodation(eye,fieldAngularPosition,angleReferenceCoord);
    assert(abs(desiredAccommodation-measuredAccommodation)<5e-3)
%}


arguments
    eye (1,1) {isstruct}
    fieldAngularPosition (2,1) {mustBeNumeric} = [0; 0]
    angleReferenceCoord (3,1) {mustBeNumeric} = [0; 0; 0]
    rayIntersectionHeight (1,1) {mustBeNumeric} = 0.25
    effectiveInfinity (1,1) {mustBeNumeric} = 1e4
    cameraMedium = 'air'
end