infection in diverse clinical conditions in a tertiary care hospital in north India.

Background & Objectives: : Bartonella henselae causes infections which closely resemble febrile illness and chronic diseases such as tuberculosis and haematological malignancies. There are not many studies on Bartonella infections from India. The present study was undertaken to diagnose B.

Incidence and progression of myopia and associated factors in urban school children in Delhi: The North India Myopia Study (NIM Study).

Aim: To evaluate the incidence and progression of myopia and factors associated with progression of myopia in school going children in Delhi.

Methods: Prospective longitudinal study of 10,000 school children aged 5 to 15 years screened after an interval of 1 year to identify new myopes (Spherical Equivalent≤ -0.5D) and progression of myopia in previously diagnosed myopic children.

BOLD fMRI and DTI in strabismic amblyopes following occlusion therapy.

Evaluation of brain cluster activation using the functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) was sought in strabismic amblyopes. In this hospital-based case-control cross-sectional study, fMRI and DTI were conducted in strabismic amblyopes before initiation of any therapy and after visual recovery following the administration of occlusion therapy. FMRI was performed in 10 strabismic amblyopic subjects (baseline group) and in 5 left strabismic amblyopic children post-occlusion therapy after two-line visual improvement.

Prevalence of myopia and its risk factors in urban school children in Delhi: the North India Myopia Study (NIM Study).

Purpose: Assess prevalence of myopia and identify associated risk factors in urban school children.

Methods: This was a cross-sectional study screening children for sub-normal vision and refractive errors in Delhi. Vision was tested by trained health workers using ETDRS charts.

Accuracy of visual assessment by school teachers in school eye screening program in delhi.

Background: Although school eye screening is a major activity of the National Program for Control of Blindness, inadequate evidence exists about accuracy of school teachers in screening.

Objectives: Compare quality of referral for subnormal vision by school teachers and primary eye care workers (PECW) in school children and to establish appropriate cutoff for identification of subnormal vision in school going children.

Materials And Methods: This was a cross-sectional study involving school children studying in classes 1 to 9 in different schools of Delhi evaluated for sub-normal vision.

Isolation & characterization of Bartonella sp. from optic neuritis patients.

Background & Objectives: Optic neuritis (ON) is characterized by sudden and rapid impairment of vision. Bartonella henselae is a known aetiological agent of cat scratch disease (CSD), which is a common cause of neuroretinitis, the least common type of optic neuritis. The present study was carried out to determine the microbiological aetiology of optic neuritis in patients attending a tertiary care eye hospital in north India, which was later confirmed with molecular characterization.

Comparative evaluation of megadose methylprednisolone with dexamethasone for treatment of primary typical optic neuritis.

Aim: To compare the efficacy of intravenous methylprednisolone and intravenous dexamethasone on visual recovery and evaluate their side-effects for the treatment of optic neuritis.

Materials And Methods: Prospective, randomized case-controlled study including 21 patients of acute optic neuritis presenting within eight days of onset and with visual acuity less then 20/60 in the affected eye who were randomly divided into two groups. Group I received intravenous dexamethasone 200 mg once daily for three days and Group II received intravenous methylprednisolone 250 mg/six-hourly for three days followed by oral prednisolone for 11 days.

A prospective clinical evaluation of augmented Anderson procedure for idiopathic infantile nystagmus.

Purpose: To evaluate the efficacy of the augmented Anderson procedure in idiopathic infantile nystagmus (IIN).

Methods: Twelve consecutive patients older than 5 years having IIN with eccentric null position and anomalous head position were enrolled in an institution-based study. Best-corrected visual acuity (uniocular and binocular and in both null position and primary position), slit-lamp examination, fundus examination, ocular motility examination, and stereopsis using TNO were recorded.

Effect of posterior tenectomy of the superior oblique on objective and subjective torsion in cases of superior oblique overaction.

Purpose: To evaluate the effect of posterior tenectomy of the superior oblique on the correction of A-pattern, superior oblique overaction and the changes in torsion that occur in such cases.

Patients And Methods: This prospective study included 15 consecutive cases of bilateral superior oblique overaction with an A-pattern of more than 20 PD, a difference of deviation between 25 degrees up-gaze and 35 degrees downgaze, and superior oblique overaction of 2+ to 3+ on a scale of 0 to 4+. Deviation was measured in the primary position, 25 degrees upgaze, and 35 degrees downgaze using the prism bar cover test, and torsion was measured using a synoptophore, the double Maddox rod test, and fundus photographs.

Cone-rod dystrophy and acquired dissociated vertical nystagmus.

Although usually a manifestation of vestibular or neurological disease, acquired nystagmus occasionally can be seen in ocular diseases such as ocular albinism and cone dystrophy. The present case of cone-rod dystrophy presenting with acquired dissociated vertical nystagmus probably demonstrates another unusual manifestation of cone-rod dystrophy.

An optic nerve hypoplasia and coloboma in a patient with hemifacial microsomia.

Posterior segment anomalies are rare features of the oculoauriculovertebral complex. Our patient had hemifacial microsomia with an optic nerve hypoplasia in one eye and an optic nerve coloboma in the other eye. The optic nerve hypoplasia was ipsilateral to the side with hemifacial microsomia and microtia.