Method and apparatus for measuring vertical and horizontal pupillary decentration

An apparatus for measuring in combination, vertical and horizontal decentration of a pupil of a patient relative to a spectacle frame, the apparatus comprising:

• a housing having a distal end defining at least one target aperture, said housing having a proximal end opposite the distal end;
• an eye-piece disposed toward the proximal end, said eye-piece permitting an operator to observe the pupil of the patient through the target aperture such that the eye-piece, the target aperture, the spectacle frame, and the pupil of the patient are in operative alignment;
• an adjustable upper, lower, and center horizontal reference marker, each operatively coupled to the housing and vertically displaceable relative thereto, said upper and lower horizontal reference markers configured to determine the position of an upper edge and lower edge of the spectacle frame, respectively, said center horizontal reference marker configured to be aligned with and intersect a center of the pupil;
• said upper, lower, and center horizontal reference markers operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a vertical distance between the center horizontal reference marker and the upper and lower reference markers, respectively, said vertical distance representing the vertical decentration;
• an adjustable left, right, and center vertical reference marker, each operatively coupled to the housing and horizontally displaceable relative thereto, said left and right vertical reference markers configured to determine the position of a temporal edge and a nasal edge of the spectacle frame, respectively, said center vertical reference marker configured to be aligned with and intersect the center of the pupil;
• and
• said left, right, and center vertical reference markers operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a horizontal distance between the center vertical reference marker and the left and right reference markers, respectively, said horizontal distance representing the horizontal decentration.

An apparatus for measuring in combination, vertical and horizontal decentration of a pupil of a patient relative to a spectacle frame, the apparatus comprising:

• a housing having a distal end defining at least one target aperture, said housing having a proximal end opposite the distal end;
• an eye-piece disposed toward the proximal end, said eye-piece permitting an operator to observe the pupil of the patient through the target aperture such that the eye-piece, the target aperture, the spectacle frame, and the pupil of the patient are in operative alignment;
• a horizontal reference marker configured to be aligned with and intersect a center of the pupil;
• at least one horizontal platform configured to contact one of an upper and lower edge of the spectacle frame;
• said horizontal reference marker and said at least one horizontal platform operatively coupled to the housing and vertically displaceable relative thereto;
• said horizontal reference marker and said at least one horizontal platform operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a vertical distance between the horizontal reference marker and the at least one horizontal platform, said vertical distance representing the vertical decentration;
• at least two adjustable vertical reference markers, each operatively coupled to the housing and horizontally displaceable relative thereto, one of the vertical reference markers configured to be aligned with and intersect the center of the pupil and the other configured to be aligned with at least one of a temporal edge and a nasal edge of the spectacle frame;
• and
• said at least two vertical reference markers operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a horizontal distance between the center of the pupil and at least one of the temporal and nasal edges of the spectacle frame, said horizontal distance representing the horizontal decentration.

An apparatus for measuring in combination, vertical and horizontal decentration of a pupil of a patient relative to a spectacle frame, the apparatus comprising:

• a housing having a distal end defining at least one target aperture, said housing having a proximal end opposite the distal end;
• an eye-piece disposed toward the proximal end, said eye-piece permitting an operator to observe the pupil of the patient through the target aperture such that the eye-piece, the target aperture, the spectacle frame, and the pupil of the patient are in operative alignment;
• a horizontal reference marker configured to be aligned with and intersect a center of the pupil;
• an upper and a lower horizontal platform configured to contact an upper and lower edge of the spectacle frame, respectively;
• said horizontal reference marker and the horizontal platforms operatively coupled to the housing and vertically displaceable relative thereto;
• said horizontal reference marker and said horizontal platforms operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a vertical distance between the horizontal reference marker and the upper and lower platforms, respectively, said vertical distance representing the vertical decentration;
• at least two adjustable vertical reference markers, each operatively coupled to the housing and horizontally displaceable relative thereto, one of the vertical reference markers configured to be aligned with and intersect the center of the pupil, and the other vertical reference marker configured to be aligned with at least one of a temporal edge and a nasal edge of the spectacle frame;
• and
• said at least two vertical reference markers operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a horizontal distance between the center of the pupil and at least one of the temporal and nasal edges of the spectacle frame, said horizontal distance representing the horizontal decentration.

An apparatus for measuring in combination, vertical and horizontal decentration of a pupil of a patient relative to a spectacle frame, the apparatus comprising:

• a housing having a distal end defining at least one target aperture, said housing having a proximal end opposite the distal end;
• an eye-piece disposed toward the proximal end, said eye-piece permitting an operator to observe the pupil of the patient through the target aperture such that the eye-piece, the target aperture, the spectacle frame, and the pupil of the patient are in operative alignment;
• a horizontal reference marker configured to be aligned with and intersect a center of the pupil;
• at least one horizontal platform configured to contact one of an upper and lower edge of the spectacle frame;
• said horizontal reference marker and said at least one horizontal platform operatively coupled to the housing and vertically displaceable relative thereto;
• said horizontal reference marker and said at least one horizontal platform operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a vertical distance between the horizontal reference marker and the at least one horizontal platform, said vertical distance representing the vertical decentration;
• an adjustable left, right, and center vertical reference marker, each operatively coupled to the housing and horizontally displaceable relative thereto, said left and right vertical reference markers configured to determine the position of a temporal edge and a nasal edge of the spectacle frame, respectively, said center vertical reference marker configured to be aligned with and intersect the center of the pupil;
• and
• said left, right, and center vertical reference markers operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a horizontal distance between the center vertical reference marker and the left and right reference markers, respectively, said horizontal distance representing the horizontal decentration.

An apparatus for measuring horizontal decentration of a pupil of a patient relative to a spectacle frame, the apparatus comprising:

• a housing having a distal end defining at least one target aperture, said housing having a proximal end opposite the distal end;
• an eye-piece disposed toward the proximal end, said eye-piece permitting an operator to observe the pupil of the patient through the target aperture such that the eye-piece, the target aperture, the spectacle frame, and the pupil of the patient are in operative alignment;
• at least two adjustable vertical reference markers, each operatively coupled to the housing and horizontally displaceable relative thereto, one of the vertical reference markers configured to be aligned with and intersect the center of the pupil, and the other vertical reference marker configured to be aligned with at least one of a temporal edge and a nasal edge of the spectacle frame;
• and
• said at least two vertical reference markers operatively coupled to a circuit which provides an electrical signal corresponding to a measurement of a horizontal distance between the center of the pupil and at least one of the temporal and nasal edges of the spectacle frame, said horizontal distance representing the horizontal decentration.

A method for measuring in combination, vertical and horizontal decentration of a pupil of a patient relative to a spectacle frame, the method comprising the steps of:

• a) operatively fixing a position of a housing relative to a head of a patient, said housing having a proximal and a distal end, said distal end defining at least one target aperture so that a line of sight of the patient is directed into the at least one target aperture;
• b) observing the pupil of the patient by viewing the pupil through an eye-piece disposed toward the proximal end of the housing such that the eye-piece, the target aperture, the spectacle frame, and said pupil of the patient are in operative alignment;
• c) aligning a lower horizontal platform and an upper horizontal platform with lower and upper edges of the spectacle frame, respectively;
• d) aligning a horizontal reference marker with a center of the pupil so that the horizontal reference marker intersects said center of the pupil;
• e) determining a measurement of the vertical decentration represented by a position of the horizontal reference marker relative to the position of the upper and lower horizontal platforms, respectively;
• f) aligning a left and a right vertical reference marker with a left and a right edge of a single lens portion of the spectacle frame, respectively;
• g) aligning a center vertical reference marker with the center of the pupil so that the vertical reference marker intersects said center of the pupil;
• h) determining a measurement of the horizontal decentration represented by a position of the center vertical reference marker relative to the position of the left and right vertical reference markers, respectively;
• i) repeating steps b) through h) for the other pupil of the patient;
• and
• j) displaying the values of the measured vertical and horizontal decentration.

A method for measuring in combination vertical and horizontal decentration with respect to pupil of a patient and a spectacle frame, the method comprising the steps of:

• a) operatively fixing a position of a measuring device relative to a head of a patient, said measuring device having a proximal and a distal end, said distal end defining at least one target aperture so that a line of sight of the patient is directed into the at least one target aperture;
• b) determining a vertical height of the spectacle frame measured between an upper and lower edge of the spectacle frame;
• c) determining a vertical center of the pupil of the patent relative to the vertical height of the spectacle frame;
• d) dividing the vertical height of the spectacle frame by two and subtracting the value of the vertical center of the pupil to obtain a value representing the vertical decentration;
• e) determining a horizontal width of a single lens portion of the spectacle frame measured between a left and a right edge of the single lens portion of the frame spectacle;
• f) determining a horizontal center of the pupil of the patient relative to the horizontal width;
• g) dividing the horizontal width by two and subtracting the value of the horizontal center of the pupil to obtain a value representing horizontal decentration;
• h) repeating steps b) through f) for the other pupil of the patient;
• and
• j) displaying the values of the measured vertical and horizontal decentration.