An ophthalmic measurement apparatus comprising: a projection optical system configured to project a pattern target toward a cornea of a subject eye; an imaging optical system provided with an imaging device configured to capture an image of the subject eye, the image including a second Purkinje image (Rp1, Rp2), which is a target image formed due to the pattern target being reflected from a posterior corneal surface of the subject eye; a processor connected to the imaging device; and a memory (102, 103) storing computer readable instructions, when executed by the processor, causing the processor to function as: a detecting unit configured to detect the second Purkinje image (Rp1, Rp2) from the image captured by the imaging device; and an acquiring unit configured to acquire posterior corneal surface information related to the posterior corneal surface of the subject eye based on the second Purkinje image (Rp1, Rp2) detected by the detecting unit, characterized in - that the projection optical system is configured to project a plurality of concentric ring target patterns as the pattern target, - that the detecting unit is configured to detect the second Purkinje image (Rp1, Rp2) for each of the ring target patterns, and - that the acquiring unit is configured to acquire posterior corneal surface information for posterior corneal surface regions different in a meridional direction of the cornea; especially - that the memory (102, 103) further adapted to store computer readable instructions, when executed by the processor, causing the processor to function as a projection control unit configured to control the projection optical system to selectively project at least one of the plurality of ring target patterns. a projection optical system configured to project a pattern target toward a cornea of a subject eye; an imaging optical system provided with an imaging device configured to capture an image of the subject eye, the image including a second Purkinje image (Rp1, Rp2), which is a target image formed due to the pattern target being reflected from a posterior corneal surface of the subject eye; a processor connected to the imaging device; and a memory (102, 103) storing computer readable instructions, when executed by the processor, causing the processor to function as: a detecting unit configured to detect the second Purkinje image (Rp1, Rp2) from the image captured by the imaging device; and an acquiring unit configured to acquire posterior corneal surface information related to the posterior corneal surface of the subject eye based on the second Purkinje image (Rp1, Rp2) detected by the detecting unit, characterized in - that the projection optical system is configured to project a plurality of concentric ring target patterns as the pattern target, - that the detecting unit is configured to detect the second Purkinje image (Rp1, Rp2) for each of the ring target patterns, and - that the acquiring unit is configured to acquire posterior corneal surface information for posterior corneal surface regions different in a meridional direction of the cornea; especially - that the memory (102, 103) further adapted to store computer readable instructions, when executed by the processor, causing the processor to function as a projection control unit configured to control the projection optical system to selectively project at least one of the plurality of ring target patterns. a detecting unit configured to detect the second Purkinje image (Rp1, Rp2) from the image captured by the imaging device; and an acquiring unit configured to acquire posterior corneal surface information related to the posterior corneal surface of the subject eye based on the second Purkinje image (Rp1, Rp2) detected by the detecting unit, characterized in - that the projection optical system is configured to project a plurality of concentric ring target patterns as the pattern target, - that the detecting unit is configured to detect the second Purkinje image (Rp1, Rp2) for each of the ring target patterns, and - that the acquiring unit is configured to acquire posterior corneal surface information for posterior corneal surface regions different in a meridional direction of the cornea; especially - that the memory (102, 103) further adapted to store computer readable instructions, when executed by the processor, causing the processor to function as a projection control unit configured to control the projection optical system to selectively project at least one of the plurality of ring target patterns. - that the projection optical system is configured to project a plurality of concentric ring target patterns as the pattern target, - that the detecting unit is configured to detect the second Purkinje image (Rp1, Rp2) for each of the ring target patterns, and - that the acquiring unit is configured to acquire posterior corneal surface information for posterior corneal surface regions different in a meridional direction of the cornea; especially - that the memory (102, 103) further adapted to store computer readable instructions, when executed by the processor, causing the processor to function as a projection control unit configured to control the projection optical system to selectively project at least one of the plurality of ring target patterns.