Assessment of Visual Acuity Outcomes in Ocular Syphilis Treated With Adjunctive Topical or Oral Steroids

Rhys Ishihara; Seth Buscho; Hannah J Yu; Praveena K Gupta

doi:10.7759/cureus.41395

Assessment of Visual Acuity Outcomes in Ocular Syphilis Treated With Adjunctive Topical or Oral Steroids

Cureus. 2023 Jul 5;15(7):e41395. doi: 10.7759/cureus.41395. eCollection 2023 Jul.

Authors

Rhys Ishihara¹, Seth Buscho¹, Hannah J Yu¹, Praveena K Gupta¹

Affiliation

¹ Department of Ophthalmology and Visual Sciences, University of Texas Medical Branch, Galveston, USA.

Abstract

Purpose: There is no consensus surrounding adjunctive steroid use in the treatment of ocular syphilis. We evaluated clinical outcomes of patients with ocular syphilis who were treated with penicillin plus either topical or oral steroids.

Methods: Nine male patients aged 26 to 72 years with a diagnosis of ocular syphilis were retrospectively identified (18 eyes). All patients were treated with penicillin and adjunctive topical or oral steroids. Visual acuity reported as the logarithm of the minimum angle of resolution (logMAR) and slit lamp findings were documented at presentation, short-term follow-up (<7 days after initiating therapy), and long-term follow-up (day 7+). Visual acuity outcomes were compared between eyes treated with topical versus oral steroids as well as eyes treated simultaneously with adjunctive steroids and penicillin versus patients treated with steroids after penicillin.

Results: At short-term follow-up, the mean logMAR (SD, Snellen fraction) visual acuity for eyes treated with topical steroids 0.93 (0.53, 20/170) was significantly lower than that for the oral steroid group 0.23 (0.09, 20/110; p=0.0075). Similarly, at long-term follow-up, the topical steroid group had a significantly lower visual acuity of 0.75 (20/112) compared to a visual acuity of 0.07 (20/25) for the oral steroid group (p=0.0022). Moreover, the oral steroid group displayed significant improvement in visual acuity at long-term follow-up compared to baseline while the topical steroid group did not demonstrate the same effect (p=0.0406 and p=0.5945, respectively). Initiation of steroid treatment simultaneously with penicillin did not result in better visual acuity than delayed steroid treatment (p>0.05).

Conclusions: Steroids are an effective adjunctive treatment for patients with ocular syphilis. Oral steroids may be superior to topical steroids for improving visual function, especially in patients with a severe inflammatory component. Patients treated with oral or topical steroids and penicillin simultaneously did not demonstrate better visual acuity outcomes than patients treated with oral or topical steroids after penicillin was initiated.

Keywords: adjunctive steroids; ocular syphilis; syphilis; systemic steroids; topical steroids; treponema pallidum.