Use your hands to shield your eyes from the flames and recite the blessing while your eyes are covered.
בָּרוּךְ אַתָּה אַדֹנָ-י אֱ-לֹהֵינוּ מֶלֶךְ הָעוֹלָם אֲשֶׁר קִדְּשָׁנוּ בְּמִצְוֹתָיו וְצִוָּנוּ לְהַדְלִיק נֵר שֶׁל שַׁבָּת קֹדֶשׁ
Transliteration: Bah-rookh ah-tah ah-doh-noi eh-loh-hay-noo meh-lekh hah-oh-lahm ah-sher ki-deh-shah-noo beh-mitz-voh-tahv veh-tzee-vah-noo leh-hahd-lik nehr shehl shah-baht koh-dehsh.
Translation: Blessed are You, Lord our G‑d, King of the universe, who has sanctified us with His commandments, and commanded us to kindle the light of the holy Shabbat.