Standard age-appropriate methods were used to assess visual acuity (how well a participant sees at different distances) with teller acuity cards, LEA symbols test and Charts. It was categorized as following: normal (measurable acuity \>= 20/40 or \>= 15 cycles/degree); below normal (20/200 \<= measurable acuity \< 20/40 or 3 cycles/degree \<= measurable acuity \< 15 cycles/degree); poor (measurable acuity \<= 20/200 or \<= 3 cycles/degree). Corrected Age (weeks) was defined as Chronological Age (weeks) - 40 + Gestational Age (weeks) in this study.

Standard age-appropriate methods were used to assess visual acuity (how well a participant sees at different distances) with teller acuity cards, LEA symbols test and Charts. It was categorized as following: normal (measurable acuity \>= 20/40 or \>= 15 cycles/degree); below normal (20/200 \<= measurable acuity \< 20/40 or 3 cycles/degree \<= measurable acuity \< 15 cycles/degree); poor (measurable acuity \<= 20/200 or \<= 3 cycles/degree). Corrected Age (weeks) was defined as Chronological Age (weeks) - 40 + Gestational Age (weeks) in this study.

Standard age-appropriate methods were used to assess visual acuity (how well a participant sees at different distances) with teller acuity cards, LEA symbols test and Charts. It was categorized as following: normal (measurable acuity \>= 20/40 or \>= 15 cycles/degree); below normal (20/200 \<= measurable acuity \< 20/40 or 3 cycles/degree \<= measurable acuity \< 15 cycles/degree); poor (measurable acuity \<= 20/200 or \<= 3 cycles/degree). Corrected Age (weeks) was defined as Chronological Age (weeks) - 40 + Gestational Age (weeks) in this study.

Standard age-appropriate methods were used to assess visual acuity (how well a participant sees at different distances) with teller acuity cards, LEA symbols test and Charts. It was categorized as following: normal (measurable acuity \>= 20/40 or \>= 15 cycles/degree); below normal (20/200 \<= measurable acuity \< 20/40 or 3 cycles/degree \<= measurable acuity \< 15 cycles/degree); poor (measurable acuity \<= 20/200 or \<= 3 cycles/degree). Corrected Age (weeks) was defined as Chronological Age (weeks) - 40 + Gestational Age (weeks) in this study.

Standard age-appropriate methods were used to assess visual acuity (how well a participant sees at different distances) with teller acuity cards, LEA symbols test and Charts. It was categorized as following: normal (measurable acuity \>= 20/40 or \>= 15 cycles/degree); below normal (20/200 \<= measurable acuity \< 20/40 or 3 cycles/degree \<= measurable acuity \< 15 cycles/degree); poor (measurable acuity \<= 20/200 or \<= 3 cycles/degree). Corrected Age (weeks) was defined as Chronological Age (weeks) - 40 + Gestational Age (weeks) in this study.

Standard age-appropriate methods were used to assess visual acuity (how well a participant sees at different distances) with teller acuity cards, LEA symbols test and Charts. It was categorized as following: normal (measurable acuity \>= 20/40 or \>= 15 cycles/degree); below normal (20/200 \<= measurable acuity \< 20/40 or 3 cycles/degree \<= measurable acuity \< 15 cycles/degree); poor (measurable acuity \<= 20/200 or \<= 3 cycles/degree). Corrected Age (weeks) was defined as Chronological Age (weeks) - 40 + Gestational Age (weeks) in this study.

Ocular alignment was assessed in primary gaze by comparing the position of the corneal light reflection in left eye and right eye (corneal light reflection assessment). Presence or absence of strabismus was recorded in primary gaze and in as many of the 9 positions of gaze as feasible with the cover test assessment of refixation movement. Extraocular muscle over action or deficiency was recorded. Ocular motility referred to eye movements governed by the 6 extraocular muscles in each eye. It was assessed by examiner observation of the participants ability to abduct, adduct, supra, and inferoduct each eye. Ocular alignment and motility included the presence or absence of strabismus (classified as Esotropia \[inward turn of the eye\], Exotropia \[outward turn of the eye\], Hypertropia \[upward turn of the eye\], Hypotropia \[downward turn of the eye\]) was recorded. Number of participants with combined data for ocular alignment and oculomotor examination (motility) at 12 months CA were reported.

Ocular alignment was assessed in primary gaze by comparing the position of the corneal light reflection in left eye and right eye (corneal light reflection assessment). Presence or absence of strabismus was recorded in primary gaze and in as many of the 9 positions of gaze as feasible with the cover test assessment of refixation movement. Extraocular muscle over action or deficiency was recorded. Ocular motility referred to eye movements governed by the 6 extraocular muscles in each eye. It was assessed by examiner observation of the participants ability to abduct, adduct, supra, and inferoduct each eye. Ocular alignment and motility included the presence or absence of strabismus (classified as Esotropia, Exotropia, Hypertropia, Hypotropia) was recorded. Number of participants with combined data for ocular alignment and oculomotor examination (motility) assessed by corneal light reflex and by the cover test at 24 months CA were reported.

Ocular alignment was assessed in primary gaze by comparing the position of the corneal light reflection in left eye and right eye (corneal light reflection assessment). Presence or absence of strabismus was recorded in primary gaze and in as many of the 9 positions of gaze as feasible with the cover test assessment of refixation movement. Extraocular muscle over action or deficiency was recorded. Ocular motility referred to eye movements governed by the 6 extraocular muscles in each eye. It was assessed by examiner observation of the participants ability to abduct, adduct, supra, and inferoduct each eye. Ocular alignment and motility included the presence or absence of strabismus (classified as Esotropia, Exotropia, Hypertropia, Hypotropia) was recorded. Number of participants with combined data for ocular alignment and oculomotor examination (motility) assessed by corneal light reflex and by the cover test at 5-Years CA were reported.

Nystagmus was observed during the ocular alignment assessments. Presence and absence of nystagmus was reported at 12 Months CA.

Nystagmus was observed during the ocular alignment assessments. Presence and absence of nystagmus was reported at 24 Months CA.

Nystagmus was observed during the ocular alignment assessments. Presence and absence of nystagmus was reported at 5 Years CA.

Refraction was a measure of the lens power required for a focused image on the retina. Refraction with cycloplegia was measured and recorded in diopters for each eye individually (left eye and right eye). Refraction with cycloplegia performed as part of the corrective lens determination procedure included measurements of sphere, cylinder, axis, and prism for each individual eye (left eye and right eye). For sphere, the negative values are summarized as 'nearsighted', and the positive values (including sphere of 0.00) are summarized as 'farsighted'.

Refraction was a measure of the lens power required for a focused image on the retina. Refraction with cycloplegia was measured and recorded in diopters for each eye individually (left eye and right eye). Refraction with cycloplegia performed as part of the corrective lens determination procedure included measurements of sphere, cylinder, axis, and prism for each individual eye (left eye and right eye). For sphere, the negative values are summarized as 'nearsighted', and the positive values (including sphere of 0.00) are summarized as 'farsighted'.

Refraction was a measure of the lens power required for a focused image on the retina. Refraction with cycloplegia was measured and recorded in diopters for each eye individually (left eye and right eye). Refraction with cycloplegia performed as part of the corrective lens determination procedure included measurements of sphere, cylinder, axis, and prism for each individual eye (left eye and right eye). For sphere, the negative values are summarized as 'nearsighted', and the positive values (including sphere of 0.00) are summarized as 'farsighted'.

Refraction was a measure of the lens power required for a focused image on the retina. Refraction with cycloplegia was measured and recorded in diopters for each eye individually (left eye and right eye). Refraction with cycloplegia performed as part of the corrective lens determination procedure included measurements of sphere, cylinder, axis, and prism for each individual eye (left eye and right eye). For sphere, the negative values are summarized as 'nearsighted', and the positive values (including sphere of 0.00) are summarized as 'farsighted'.

Stereoacuity, a measure of depth perception, was assessed using the Lang Stereotest. Number of participants with presence and absence of stereopsis (the ability to perceive depth and 3-dimensional structure) was reported.

An AE is any untoward medical occurrence in a clinical investigation participant administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment.