\begin{table}[h]
\centering
\caption{Differentiating features between Neuroretinitis and other closely resembling entities.}
\label{table_2}
\begin{tabular}{llllll}
 & Neuroretinitis & Papillitis & Papilledema & CRVO & AION \\
VA & 6/60--6/12 & Light perception to 6/12 & No visual loss & Moderate to severe visual loss & Moderate to severe impairment \\
Pupillary reactions & Relative afferent pupillary defect (RAPD+) & RAPD+ & Normal & Normal/RAPD+ & RAPD+ \\
Laterality & Unilateral, rarely bilateral & Unilateral/bilateral & Always bilateral & Unilateral & Typically unilateral \\
Eye pain & Nil & Pain especially on upgaze & Nil & painless & painless \\
Visual fields & Centroceacal scotoma & Central/centroceacal scotoma & Enlarged blind spot & Normal & Altitudinal field defects \\
Color vision & Severely impaired, disproportionate to visual loss & Severely impaired, disproportionate to visual loss & Normal & Normal & Diminished in proportion to level of v/a \\
Systemic symptoms & Fever, rash & Weakness of limbs & Headache, vomiting & - & Headache, jaw claudication, polymyalgia rheumatica \\
Fundus findings & Disc swelling of 2D, hyperemic with macular star figure & Disc swelling rarely above 2D, venous engorgement and haemorrhages less marked & Disc swelling frequently higher, upto 8--9D, more venous engorgement, macular star may develop & Disc edema, macular star along with haemorrhages and soft exudates & Pale disc edema \\
Fluorescein Angiography & Leakage from disc and peripapillary retina & Leakage from disc and peripapillary retina & Leakage from disc and peripapillary retina & Shows areas of capillary non-perfusion & Unequal choroidal filling in arterial phase \\
VEP & Decrease in amplitude, increase in latency & Decrease in amplitude, increase in latency & Normal & - & Decrease in amplitude \\
Specific associations & Syphilis, cat-scratch disease, Lyme's disease & Multiple sclerosis & - & hypertension, diabetes, glaucoma & Giant cell arteritis, hypertension, diabetes \\
Prognosis & Good & Good & Good with relief of raised ICT & Depends on initial visual acuity & Poor \\
\end{tabular}
\end{table}

disc swelling that may on occasion be associated with the development of a macular star figure. These mimicking conditions include papilledema, anterior ischemic optic neuropathy, and infiltration of the optic disc by tumor.\cite{14} Systemic hypertension may also produce both optic disc swelling and a macular star figure. The disc edema and retinopathy resolves after the hypertension is controlled.\cite{29} Optic disc swelling in patients with systemic vascular disease like diabetes and hypertension can be differentiated form neuroretinitis by the absence of abrupt visual loss, background retinopathy and a medical history of such conditions. Spontaneous resolution of the disc edema and recovery of visual acuity serve as distinguishing features of neuroretinitis from papilledema and ischemic optic neuropathy.

\section{Investigations}

Investigation into the etiology of neuroretinitis should begin with a careful history including questioning regarding sexually transmitted diseases, cat-scratches, skin rashes, tick bites, lymphadenopathy, fever, and flu-like illnesses. Complete physical and ocular